Update clang to r328903

Bug: http://b/77532044

* b/77967848 - Disable -Wc++98-compat-extra-semi

Test: Test various targets in AOSP and internal branches.  For Googlers,
go/clang-r328903-testing

Change-Id: If08dafb9ad993fb686dfd6eeb5e2d61a9c99bd0b
diff --git a/cc/config/clang.go b/cc/config/clang.go
index 1323849..ba1cd3c 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -177,6 +177,10 @@
 		// warning are fixed.
 		"-Wno-enum-compare",
 		"-Wno-enum-compare-switch",
+
+		// Disable c++98-specific warning since Android is not concerned with C++98
+		// compatibility.
+		"-Wno-c++98-compat-extra-semi",
 	}, " "))
 }