[AST] Adapt Polly to AnalysisSetTracker changes. NFC.

The method AliasSetTracker::getAliasSetForPointer was removed and replaced by AliasSetTracker::getAliasSetFor for the restructuring in r339930. 

Since Polly uses AliasSetTracker::getAliasSetForPointer, a temporary fix has been committed in r339937 with a comment:

     Can someone from polly please migrate usage and then delete the wrapper?

This commit is doing exactly that.

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@340072 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed