[astro][hid] Goodix touch driver

TEST: test on astro with hidtouch
Change-Id: I780befb0ffdf83680af7124f0bb6adb33f6f5cf1

[hid][touch] Add support for Eyoyo 10" touch panel.

Change-Id: Idcfb3f35529cec918ebc44ddecd876fb06b10e0d
Tested: Ran hidtouch and verified touch contacts show up.

[system][hid] Make ambient light sensor interface generic

ZX-2320 #comment Add generic ambient sensor type to hid parser and make ambient light sensor interface generic

Test: hid parse /dev/class/input/xxx

Change-Id: I0fe9f3c59fbadd4421216417fdfd13f4e52b417d

[astro][light] Add HID support to ambient light sensor driver

ZX-2320 #comment add HID support to light sensor driver

Test: Read the HID device's descriptor and report using the hid/hidsensor uapps

Change-Id: Ie6c290bffcc3b12ac887199961d57635f7d8145e

[astro][touch] ft3x27 driver

Change-Id: I2958fdef9e2a8b0a4b641dd5078d2fb6e60d1843

[hid] Revert "Add Google Tablet Motion Control Device"

This reverts commit aa7f98916dba6e30ebdc765741e7df6e5fccb719.

Change-Id: I707a96811a9183ce882172672fb5618b3ab93c11

[hid] Add Google Tablet Motion Control Device

Change-Id: Ib37b011642b9d6b8b8422c3bae252a356171e953

[hid][touch] Add support for egalax touch screen

This adds support for this panel in single touch mode. The panel
may support multi-touch, but this requires discovering how to
flip the panel into that mode.

Change-Id: I75c7fd27e73dec8df9d6fd924d5639dcceee8151

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[ulib][hid] Add new touchpanel descriptor

MG-1102 #comment Add HID parsing structs

Change-Id: Icb1214de77041cc7364e2d2a90ec9fe2c9bed5d5

[hid] Add hooks for samsung multitouch.

Change-Id: I3a105459f7077d270bb85963389f00779273fe78

[build] flatten the build

Previously we treated kernel/, system/, and third_party/ as
overlays on a shared namespace. This required the concept
of "canonical" module names, and a lot of complexity to ensure
that things didn't collide and the build worked.

This change gets rid of that, no longer passes -I to make,
so that include directives from our *.mk files do not magically
wildcard across various paths, etc.

The most user-visible change is that everywhere where a module
name is specified (MODULE_DEPS, MODULE_LIBS, etc), full module
names like kernel/lib/io or system/ulib/mxio must be used instead
of previously-allowed "short" names like lib/io and ulib/mxio.

The build output still has a similar shape, but the first segment
of the module path (kernel/, system/, or third_party/) is no
longer elided under $(BUILDDIR)

Change-Id: I525aba1da1c86eb7a86007bddc669f7eeebfedd5

[build][musl] refer to musl libc as ulib/c

This makes the build rules and the intermediate
output files easier to understand, without having
to modify the path where musl libc lives.

The biggest observeable difference is the build
intermediate files:

$ ls build-magenta-pc-x86-64/ulib/c
config-module.h libc.abi.h libc.abi.stamp libc.so libc.so.id libc.so.strip
libc.a libc.abi.o libc.a.opts libc.so.abi libc.so.opts third_party

which previously were at build-magenta-pc-x86/ulib/musl
and named libmusl.*

and the replacing of ulib/musl with ulib/c in the library
dependencies of all the rules.mk files (the vast bulk of
this change)

Change-Id: If9c5d522099d2c9ac5bdb666b8e67a2eb3d316ee

[build] whitelist libraries for sysroot

The sysroot should be carefully curated, not blindly include
every library that we happen to build within the magenta build.

MODULE_EXPORT is now used to indicate a library belongs in sysroot,
either as static "a", shared "so", or both "a so".

MODULE_NAME can override the static library base name if desired,
similar to how it overrides the installed binary name for apps.

Change-Id: Id97163a46e6ade155e82ad88ebcb68d48e243f57

[ulib][hid] Add Acer12 touchscreen support

Change-Id: Ibd56a4e4c9a993db4e423d131f5e8fb343a8ac63

[hidctl] hidctl driver for injecting input events

Opening the hidctl misc device yields a device instance that can be
used to simulate a HID input device. Use an ioctl to set the HID
configuration, and then write to the instance to send input reports.

Change-Id: Ieb31f2d33cb419f13422553401fadd42cfd83216

[system] align license and license banners with Fuchsia

This adjusts the Magenta userspace code to match the prevailing
license in Fuchsia (three-clause BSD), using the same banner
and license text.

Change-Id: I6b6d79435c5dbaa32027888874849e4f47aaa7be

[hid] Add basic hid library

Initial commit handles the boot protocol for keyboards.

Change-Id: I8ac214c12365bff9f0c7e6c7a418216c438b1da6