AST: Rename PragmaPackAttr to MaxFieldAlignmentAttr, which is more accurate.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104795 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index 0aee70c..933034e 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -765,7 +765,7 @@
     SIMPLE_ATTR(Overloadable);
     SIMPLE_ATTR(Override);
     SIMPLE_ATTR(Packed);
-    UNSIGNED_ATTR(PragmaPack);
+    UNSIGNED_ATTR(MaxFieldAlignment);
     SIMPLE_ATTR(Pure);
     UNSIGNED_ATTR(Regparm);
     STRING_ATTR(Section);