[OpenMP] Extended parse for 'always' map modifier

https://reviews.llvm.org/D32807

This patch allows the map modifier 'always' to be separated by the map type (to, from, tofrom) only by a whitespace, rather than strictly by a comma as in current trunk.




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@302031 91177308-0d34-0410-b5e6-96231b3b80d8