Rename hipComplex.h -> hip_complex.h

Change-Id: I86af4ddccc6ebb19606156b459e3065d2c979108

tests/src/hipComplex.cpp

@@ -18,10 +18,10 @@ THE SOFTWARE.
 */
 
 
-#include<iostream>
+#include <iostream>
 #include "hip/hip_runtime.h"
 #include "hip/hip_runtime_api.h"
-#include<hip/hcc_detail/hipComplex.h>
+#include "hip/hcc_detail/hip_complex.h"
 
 #define LEN 64
 #define SIZE 64<<2