[syscalls] Change vmar_... calls

- Create zx_vm_option_t type
- Change ZX_VM_FLAG_... to ZX_VM_... and make them new type.
- Change int32_t flags parameters to zx_vm_option_t options
- Make the options parameter be second.

- Modify vmar_..._old functions to keep other repos working.
Once they've all been updated these functions will go away.

ZX-2264
Test:CQ

Change-Id: I1faf4cc4e1e4dabf3d8ef680e398d83a545b0f09

[uapp][gfxtest] Migrate gfxtest to framebuffer lib

Change-Id: Id25a6c0c5a205bf7c0498de6c75f23f23521ca75

[gfx]fix gfx apps

mild cheat by opening framebuffer as a virtcon, which allows
the utility to grab a framebuffer.

Change-Id: Ief57e0b291058483bdfddd20f8a0c0e737bdf98d

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[uapp] Add copyright notices

Change-Id: I579fa30a97095dbe7d93319c9a080c8ef0e8abde

[gfxtest][gfxfractal] use framebuffer, not console

Change-Id: I333f3cf6a8cf38aa9f5f901c47c4d9ed1c91d918

[time] Switch callers of syscalls with timeouts to use conversion function

This is in preparation for moving syscalls to absolute deadlines rather
than relative timeouts.

Change-Id: Ic85abbf76f34fbce7899c2505be840e3d3dcf7ff

[musl][magenta] Move process handle header into magenta

Change-Id: I00eb8f5ca7fbaf9297f3b1e5b391be00ce5d11e2

[vmar][uspace] Migrate the remaining userspace code

This removes the last of the in-repo consumers of the old
VM interface.

Change-Id: I3c7e974802f325b6325254c81b7ba85ebbe9ed2a

[uapp] add example app to draw to the screen

Change-Id: Ia68777db57d50b1a90da6627d048d870d74efbcf