Various build rule changes to match AOSP:
Add libunwind_llvm and libdl as dependencies for libc++ on device
Always add libcompiler_rt-extras as a dependency
Add libm, libc, and libdl as depnendencies for libc++ static binaries
Disable some clang warnings, and add some clang filtered cflags
Add -fstack-protector to host linux builds
Add jack_flags property to java modules (currently ignored)
Change-Id: Ic0da617bdeaf25f58cb8298dd9ea91b7d6509151
Add art and libnativehelper to the root Blueprints file, and
add a warning used by art to the clang unknown flags list.
Change-Id: If282413103fa20fa66422e4330fbabff61b66144
Initial build logic for building android with soong. It can build
a variety of C and C++ files for arm/arm64 and host.
Change-Id: I10eb37c2c2a50be6af1bb5fd568c0962b9476bf0
