[msan] Get rid of "using std::string" in msandr.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177714 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: work around FileCheck bug with empty outputs



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177715 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Place dlopen in an anon namespace.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177716 91177308-0d34-0410-b5e6-96231b3b80d8