[SYCL] Fix typo in host impl for some math builtins (#12845)

The ones with FP/int vector parameters were implemented incorrectly.

sycl/source/builtins/math_functions.cpp

@@ -210,7 +210,7 @@ __SYCL_EXPORT half sincos_impl(half x, half *p) { return __sincos(x, p); }
  __SYCL_EXPORT float __##NAME##_impl(float x, int y) { return IMPL(x, y); } \
  __SYCL_EXPORT double __##NAME##_impl(double x, int y) { return IMPL(x, y); } \
  __SYCL_EXPORT half __##NAME##_impl(half x, int y) { return IMPL(x, y); } \
- HOST_IMPL(NAME, pown /* delegate to scalar */) \
+ HOST_IMPL(NAME, NAME /* delegate to scalar */) \
  FOR_EACH1(EXPORT_VEC_LAST_INT_1_16, NAME, FP_TYPES)
 
 BUILTIN_MATH_LAST_INT(pown, std::pow)

sycl/test-e2e/Basic/built-ins/vec_math.cpp

@@ -24,6 +24,9 @@
  } \
  for (int i = 0; i < DIM; i++) \
  assert(abs(result[i] - EXPECTED[i]) <= DELTA); \
+ auto host_result = FUNC(__VA_ARGS__); \
+ for (int i = 0; i < DIM; i++) \
+ assert(abs(host_result[i] - EXPECTED[i]) <= DELTA); \
  } \
  }