Add notes for suppressing and (if it's a zero-arg function returning bool) fixing the function-to-bool conversion warning.

llvm-svn: 146280
diff --git a/clang/test/SemaCXX/condition.cpp b/clang/test/SemaCXX/condition.cpp
index 7854d51..099c11c 100644
--- a/clang/test/SemaCXX/condition.cpp
+++ b/clang/test/SemaCXX/condition.cpp
@@ -49,7 +49,8 @@
   if ("help")
     (void) 0;
 
-  if (test3) // expected-warning {{address of function 'test3' will always evaluate to 'true'}}
+  if (test3) // expected-warning {{address of function 'test3' will always evaluate to 'true'}} \
+                expected-note {{prefix with the address-of operator to silence this warning}}
     (void) 0;
 }