Make shootout test work on OSX

Change-Id: I0cac98b68ee67eb016e32eeb17fc41a2cce38d9b
Reviewed-by: hjk <hjk@theqtcompany.com>

tests/manual/shootout/tst_codesize.cpp

@@ -303,7 +303,11 @@ void tst_CodeSize::codesize_data()
 #ifdef Q_CC_MSVC
     s.cmd = "dumpbin /DISASM /SECTION:.text";
 #else
+# ifdef Q_OS_MAC
+    s.cmd = "otool -t -v";
+# else
     s.cmd = "objdump -D -j.text";
+# endif
 #endif
     s.title = "This 'test' compares different approaches to return something \n"
               "like an immutable string from a function.";