[doc parsing] use getParamName to access parameter 
for current(rewritten) comment and getParamNameAsWritten
to access param name coming with \param marker.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166231 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed