Initial implementation of -modules-earch-all option, for searching for symbols in non-imported modules.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206977 91177308-0d34-0410-b5e6-96231b3b80d8
Add aarch64-linux-android triple for Android.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206979 91177308-0d34-0410-b5e6-96231b3b80d8
Fix unused variable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206981 91177308-0d34-0410-b5e6-96231b3b80d8