implement serialization support for @encode,
fix a couple of bugs in reader support for ObjCInterfaceDecl,
and add support for reading ObjCInterfaceType.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69779 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/PCH/objc_exprs.h b/test/PCH/objc_exprs.h
new file mode 100644
index 0000000..136a34c
--- /dev/null
+++ b/test/PCH/objc_exprs.h
@@ -0,0 +1,5 @@
+
+inline const char *foo() {
+  return @encode(int);
+}
+