Import local copy of gmsl for parity with Android NDK build system

Change-Id: Ie27e57fc0c7218d19a3c7f5a7ba7abaf5179cc31
Add local copy of asan_symbolize.py

Mirrored from https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/asan/scripts/asan_symbolize.py

Helper script to be used to symbolicate certain stack traces, for example
from clang sanitizers like http://clang.llvm.org/docs/AddressSanitizer.html

Change-Id: Ibfa68f1d475955ea5484f37a54f87a08d426421c
Import local copy of up to date nasm for Darwin with MachO64 support

Default nasm on MacOSX (up to 10.9 at least) doesn't support MachO64
format. In order for the build to succeed without requiring host to
have another copy of nasm installed (from MacPort or Brew), use a local
copy of nasm into tools directory

Change-Id: I913b17b3099a1dd0c292d3828a0d031b1ce6b31e
Use GNU ar scripts to merge static libraries when libtool isn't available

Change-Id: Ifa52baf59ce18afee6b45d2b69c9127413008179
Sync build system

Change-Id: I6e1a46ed28d81cb305a3dcd023526216862ab00b