Add TARGET_GCC_VERSION

Default to 4.6, but can overwritten to something else in
prebuilts/gcc/$os/$arch/$arch-linux-android*-$ver

Change-Id: I16f99d642b8ff8e831d392261a0c536041107051
core: config: use 4.7 by default unless TARGET_GCC_VERSION is set otherwise
envsetup: use 4.7 by default
core: more 4.7 fixes
Build: Removed Quick Search Box from the build.

Its ugly and is probably replaced by the Google Search bar after flashing
gapps.

Change-Id: Ibab8221c45f49f1502e08cbe55635693c9a084c8
Signed-off-by: Arham Jamal <arhamjamal@gmail.com>
Get sounds back & inherit video prebuilts

Dont know where newaudio.mk went but its not there... back to
allaudio.mk
linux-arm: remove icf flags
We use bfd linker, not gold so this is an unnecessary flag