Misc fixes

1. only strip binaries in build-llvm.sh
2. don't package ld.mcld.exe for now (until it's fixed)
3. build 64-bit host prebuilt first (so testing on AOSP
   build can be launched earlier)

Change-Id: I7c6a1711204f5c2aad257617e363208c4428548f
3 files changed