[zircon-internal] Make zircon-internal visible to the kernel

Also, move ktrace.h to zircon-internal. This change lets us share this
header between userspace and the kernel without including it in the SDK.

Test: No behavior change
Change-Id: I1a287dfdf8ba21ea49b77166824c70fef49962a3

[syscalls] Update parameter types and names

This CL updates the parameter types and names for a number of syscalls
to match the Zircon System API rubric. There's more work to do to make
all the syscalls conform to the rubric, but this change is a start.

Change-Id: I218ac5e7e0cbd80a8c69fef7891ad40b78b6b407

[ddk] Remove driver bind() cookie and unbind() callback

Also removed "owner" and "owner_cookie" from internal zx_device_t struct

Adjusted intel-hda audio drivers to create devices to hold driver context
rather than using the driver bind cookie.

Change-Id: I0eca7f6fa3b155be71843291812e7aa9fea5bf55

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[ktrace] Add start and stop ioctls to ktrace driver.

Change-Id: I3e523894df8c2710f4539bac2ec505cc6d4b216e

[dev][misc] Use new magenta error names

Change-Id: Ic468b633392b3a1a89d41d019437761d2b0eec3d

[udev][ktrace] rename udev/ktrace to dev/misc/ktrace

Change-Id: I2d000605bc3b2f6ce124103b12788fbffa9deb04