Adds external/libcxx and external/libcxxabi to manifest

Change-Id: I520b595d69834ff00140859e1d06dcc6d347e078
Add platform/prebuilts/android-emulator

Change-Id: Ifcd9e4bebc156be815fb64b9efe3d29b2a23ab91
Add clone-depth to platform/prebuilts/android-emulator

Change-Id: I3666d8a70dbeee029002bf1e764aa2616b16f45d
Update manifest for latest external/chromium_org.

Bring the chromium_org projects in sync with the latest version.

Change-Id: Iffefd8539530b58255153fac40e5b92cefa11312
Add the external/jemalloc project.
Add angle_dx11 back to the manifest

Change-Id: I76659f3daf83cce0e18fbf4a8e8ac345e6db2eb4
Revert "Add angle_dx11 back to the manifest"

Now that chromium has been brought up to date, we no longer need this old project.

This reverts commit 72a1bb6dac0d867d645ef54aa3ed654a7ab552db.

Change-Id: I4b25a4729108fe0f925ec98b6bd8e47c625ef581
Add host prebuilts for Clang 3.5.

Change-Id: I2e2a3f921e67e972ef9962257ef80903780a031b
Add clone-depth="1" to prebuilts/qemu-kernel

Change-Id: I212284ee87d823f9dda0c94114715d084eb3fd25
Merge branch 'master' of https://android.googlesource.com/platform/manifest into HEAD