Add coverage tests of C and Obj-C language features.
 - AST printing, dumping, serialization, codegen.
 - HTML printing.
 - Parser callbacks.

Several of these are XFAIL because they trigger unimplemented code.

llvm-svn: 57081
diff --git a/clang/test/Coverage/codegen.c b/clang/test/Coverage/codegen.c
new file mode 100644
index 0000000..eb2873c
--- /dev/null
+++ b/clang/test/Coverage/codegen.c
@@ -0,0 +1,4 @@
+// RUN: clang -emit-llvm -o %t %s
+// RUN: clang -emit-llvm-bc -o %t %s
+
+#include "c-language-features.inc"