fixed broken tests and device code for integer intrinsics

1. Fixed build issues with new Integer intrinsics
2. Changed tests to work exactly as CUDA code
3. Still some integer intrinsics need to be supported

Change-Id: Ie6f4171259cf4da517436895d4f6f01e01f59b11

tests/src/deviceLib/hip_ffs.cpp

@@ -32,7 +32,7 @@ THE SOFTWARE.
 #include <stdlib.h>
 #include <iostream>
 #include "hip/hip_runtime.h"
-
+#include "hip/device_functions.h"
 
 #define HIP_ASSERT(x) (assert((x)==hipSuccess))
 
@@ -184,4 +184,3 @@ int main() {
 
   return errors;
 }
-