Add a FIXME to check_lint

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@188266 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan/Win] Add the first version of the RTL thunk that should be linked with instrumented DLLs

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@188267 91177308-0d34-0410-b5e6-96231b3b80d8