[SYCL] modify std_complex_math_fp64_test.cpp and std_complex_math_test.cpp, as math_utils.hpp changes

Signed-off-by: haonanya <[email protected]>

Author: haonanya1

sycl/test/devicelib/std_complex_math_fp64_test.cpp

@@ -4,6 +4,7 @@
 #include <CL/sycl.hpp>
 #include <cassert>
 #include "math_utils.hpp"
+using namespace std;
 
 namespace s = cl::sycl;
 constexpr s::access::mode sycl_read = s::access::mode::read;

sycl/test/devicelib/std_complex_math_test.cpp

@@ -5,6 +5,8 @@
 #include <cassert>
 #include "math_utils.hpp"
 
+using namespace std;
+
 namespace s = cl::sycl;
 constexpr s::access::mode sycl_read = s::access::mode::read;
 constexpr s::access::mode sycl_write = s::access::mode::write;