Recognize __unaligned keyword after type specifier

The __unaligned keyword can appear after a struct definition:

  struct foo {...} __unaligned *x;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223412 91177308-0d34-0410-b5e6-96231b3b80d8
Parse qualifiers after comma in declarator lists as a Microsoft extension

MSVC parses and ignores these with a warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223413 91177308-0d34-0410-b5e6-96231b3b80d8