Fix rocBLAS compilation failure (#1677)

SWDEV-212749:
o Recent changes to “add support for extended launch” require hip_runtime.h to be include in hip_ext.h
o Order in which external applications include hip_hcc.h/hip_runtime.h causes compilation failure

include/hip/hip_ext.h

@@ -22,7 +22,7 @@ THE SOFTWARE.
 
 #ifndef HIP_INCLUDE_HIP_HIP_EXT_H
 #define HIP_INCLUDE_HIP_HIP_EXT_H
-#include "hip/hip_runtime_api.h"
+#include "hip/hip_runtime.h"
 #ifdef __HCC__
 
 // Forward declarations: