add math.h to cover sqrtf function

Change-Id: Ia37752710cea4ca77e0a4e61f8e69a0355d9488d


[ROCm/clr commit: bfa61eac2c]

projects/clr/hipamd/include/hip/hcc_detail/hip_complex.h

@@ -24,6 +24,7 @@ THE SOFTWARE.
 #define HIP_INCLUDE_HIP_HCC_DETAIL_HIP_COMPLEX_H
 
 #include "hip/hcc_detail/hip_vector_types.h"
+#include <math.h>
 
 #if __cplusplus
 #define COMPLEX_ADD_OP_OVERLOAD(type) \