Merge pull request #18 from pimanttr/use-libc++abi

Implement setInfoBasedOnIPRegister for _LIBUNWIND_SUPPORT_ARM_UNWIND
Cleanups on the getInfoFromEHABISection method

Add comments, rename variables, move around code. Should
be functionally equivalent.

Change-Id: Ib4319e593b2b8483f74195a713a45c3b8707ca10
Start trying to wire-up personality functions.

Change-Id: I8712f7d89713a794925c7e4f075f653a1ca4e3f5
Merge branch 'use-libc++abi' of https://github.com/awong-dev/ndk into use-libc++abi

Conflicts:
	sources/cxx-stl/llvm-libc++abi/libcxxabi/src/Unwind/UnwindCursor.hpp

Change-Id: Ie9b9b82ce5540ca2d6a4e7fd865ed12c55bbdb78
Ifdef unwind API for ARM, fix UnwindLevel1 to match spec, and (attempt to) fix __gxx_personality_v0 to match the ABI