Don't mention -fno-diagnostics-print-source-range-info in manual.

Clang doesn't understand it.

If someone wants to teach clang about that flag instead, please also add
support for -fno-diagnostics-parseable-fixits for consistency.

Until then, let the documentation match the current behavior.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171952 91177308-0d34-0410-b5e6-96231b3b80d8