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


[ROCm/hip commit: c0fd0921cb]

projects/hip/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;
 }
-