Tweak location of diagnostic for -Wunreachable-code

test due to recent changes to the CFG.  The
diagnostic is somewhat in the wrong place, but
the -Wunreachable-code diagnostic needs to be
revamped anyway since most of the diagnostics
in this test case are redundant.

llvm-svn: 121961

clang/test/SemaCXX/warn-unreachable.cpp

@@ -39,8 +39,10 @@ void test2() {
 void test3() {
   halt()
     --;         // expected-warning {{will never be executed}}
-  halt()
-    ?           // expected-warning {{will never be executed}}
+  // FIXME: The unreachable part is just the '?', but really all of this
+  // code is unreachable and shouldn't be separately reported.
+  halt()        // expected-warning {{will never be executed}}
+    ? 
     dead() : dead();
   live(),
     float       // expected-warning {{will never be executed}}