Rename hipComplex.h -> hip_complex.h

Change-Id: I86af4ddccc6ebb19606156b459e3065d2c979108

include/hip/hip_complex.h

@@ -25,9 +25,9 @@ THE SOFTWARE.
 #include <hip/hip_common.h>
 
 #if defined(__HIP_PLATFORM_HCC__) && !defined (__HIP_PLATFORM_NVCC__)
-#include <hip/hcc_detail/hipComplex.h>
+#include <hip/hcc_detail/hip_complex.h>
 #elif defined(__HIP_PLATFORM_NVCC__) && !defined (__HIP_PLATFORM_HCC__)
-#include <hip/nvcc_detail/hipComplex.h>
+#include <hip/nvcc_detail/hip_complex.h>
 #else
 #error("Must define exactly one of __HIP_PLATFORM_HCC__ or __HIP_PLATFORM_NVCC__");
 #endif