Give invalid tag types 8-bit size and alignment, rather than 1-bit

alignment, which causes traps further down the line. Fixes
<rdar://problem/9109755>, which contains a test case far too large to
commit :(

llvm-svn: 129861

clang/lib/AST/ASTContext.cpp

@@ -878,8 +878,8 @@ ASTContext::getTypeInfo(const Type *T) const {
     const TagType *TT = cast<TagType>(T);
 
     if (TT->getDecl()->isInvalidDecl()) {
-      Width = 1;
-      Align = 1;
+      Width = 8;
+      Align = 8;
       break;
     }