[OPENMP] Improved code and replaced struct by lambda.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211660 91177308-0d34-0410-b5e6-96231b3b80d8
Reformat.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211661 91177308-0d34-0410-b5e6-96231b3b80d8
VirtualFileSystemTest.cpp: Get rid of initializer list on std::vector, to appease msc17.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211662 91177308-0d34-0410-b5e6-96231b3b80d8
Tools.cpp: Update getLinuxDynamicLinker() to return Twine instead of StringRef, since r211598 has introduced manipulation of return string.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211663 91177308-0d34-0410-b5e6-96231b3b80d8