core: support make 4.00

Make 4.00 is now out, and builds work fine with it.

Change-Id: I49e36d651a7997a52270badb0e8badd975f64e8f
Add FORCE_BUILD_RS_COMPAT option.

This enables the .so libraries to be built for apps using the
RenderScript support library. Traditionally, we trim these .so
files from full platform builds.

Change-Id: I6f8e9b8d2b671338d3d5a5ac0bfcc60fd448688b
Merge "Add FORCE_BUILD_RS_COMPAT option."
Merge "core: support make 4.00"
Run ar in Deterministic mode.

Unfortunately no such flag was found for the host ar on Mac OS X.
https://code.google.com/p/android/issues/detail?id=60705

Change-Id: Ic2f75c871f0b5ae3cf20c1255458f7b921054d67
Merge "Run ar in Deterministic mode."
Add utility function find-files-in-subdirs

find-files-in-subdirs uses utility find to find given files in the given
subdirs. This function uses $(1), instead of LOCAL_PATH as the base.

Change-Id: Ib76631c97acd257d651a580cbad767606874f5d0
Merge "Add utility function find-files-in-subdirs"
Merge https://android.googlesource.com/platform/build

Conflicts:
	core/main.mk