Save 100k by not using bloated sha3 code

Probably makes sha3 calculations somewhat slower.

Change-Id: Ie082c163b91d4e2282ad68b810e56b2437a1eb8a
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

src/3rdparty/sha3/KeccakF-1600-interface.h

@@ -14,7 +14,11 @@ http://creativecommons.org/publicdomain/zero/1.0/
 #ifndef _KeccakPermutationInterface_h_
 #define _KeccakPermutationInterface_h_
 
+#include <private/qglobal_p.h>
+
+#if QT_CONFIG(sha3_fast)
 #include "KeccakF-1600-int-set.h"
+#endif
 
 static void KeccakInitialize( void );
 static void KeccakInitializeState(unsigned char *state);

src/corelib/configure.json

@@ -558,6 +558,12 @@
             "purpose": "Provides a framework for gestures.",
             "section": "Utilities",
             "output": [ "publicFeature", "feature" ]
+        },
+        "sha3-fast": {
+            "label": "Speed optimized SHA3",
+            "purpose": "Optimizes SHA3 for speed instead of size.",
+            "section": "Utilities",
+            "output": [ "privateFeature" ]
         }
     },