[Basic/FileManager] Propagate whether a file 'IsVolatile' to the file opening functions.

Needs llvm r208007.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208008 91177308-0d34-0410-b5e6-96231b3b80d8
During parsing, update the range of the Declarator to include the identifier.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208011 91177308-0d34-0410-b5e6-96231b3b80d8