Check that bodies and calls but not declarations

are marked nounwind when compiling without
-fexceptions.

llvm-svn: 49393

llvm/test/CFrontend/2008-04-08-NoExceptions.c

@@ -0,0 +1,7 @@
+// RUN: %llvmgcc -S -o - %s | grep nounwind | count 2
+// RUN: %llvmgcc -S -o - %s | not grep {declare.*nounwind}
+
+void f(void);
+void g(void) {
+  f();
+}