make gjk a bit more robust, try different initial guess vector if it fails to find a solution (happens for queries with large differences in shape size)

src/BulletCollision/NarrowPhaseCollision/btGjkPairDetector.cpp

@@ -35,7 +35,7 @@ subject to the following restrictions:
 	btScalar gGjkEpaPenetrationTolerance = 1e-7;
 #else
 	#define REL_ERROR2 btScalar(1.0e-6)
-	btScalar gGjkEpaPenetrationTolerance = 0.001;
+	btScalar gGjkEpaPenetrationTolerance = BT_LARGE_FLOAT;
 #endif
 
 //temp globals, to improve GJK/EPA/penetration calculations