[sanitizer] Rename 2 files *.h->*.inc as appropriate.

Also add a missing include.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172814 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] kill some dead code

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172815 91177308-0d34-0410-b5e6-96231b3b80d8