Add platform/external/icu
Add platform/frameworks/multidex
Remove gcc projects not in use any more.

Change-Id: I9f1b24b1606ac11856bee796204bbf68cd3ef6be
Reviewed-on: https://googleplex-android-review.git.corp.google.com/502753
Reviewed-by: Andrew Hsieh <andrewhsieh@google.com>
Reviewed-by: Baligh Uddin <baligh@google.com>
Reviewed-by: Chad Jones <chadj@google.com>
Add platform/packages/apps/TvSettings
Add platform/external/chromium_org/third_party/boringssl/src
Add platform/system/keymaster
Remove unused host Linux gcc project.
Remove unused project external/libppp.

Bug: 16795898
Remove external/icu4c and add external/icu to the PDK.

Bug: 16891889
Remove external/xdelta3 and external/syspatch

BUG: 17299918
Change-Id: I080399c35ea62f1e40dca32728a7c9e3ca57795c
Remove Chromium's copy of OpenSSL.

Chromium now uses boringssl instead of openssl; remove the
no-longer-maintained copy of openssl.

Change-Id: Ic923b036c70dcfbaa374ea187badb76e76422935
Add platform/external/chromium_org/third_party/libjpeg_turbo
Add platform/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9
Add platform/prebuilts/gcc/darwin-x86/arm/arm-linux-androideabi-4.9
Remove libcxxrt from the manifest.

We moved away from this project a while ago.

Bug: 17451546
Remove external/grub.

This project is horribly out of date, and is no longer used.
No longer need bootable/diskinstaller.

This was only used by the vbox target, which is now dead.
Remove platform/external/sil-fonts

BUG:17508191
Change-Id: I7bc7dc244e5f5839630395bef4104a102428a667
Remove platform/external/hyphenation and platform/external/libxslt

Change-Id: I1b42f5417f9225c56c8f8a4bef30ff519112d398
Remove platform/frameworks/opt/mailcommon

Change-Id: I1e7d2554a46f3999c04b151abc5c0a9318cd714a