[OpenMP][CUDA] Add missing overload for remquo(float,float,int*)

Reported by Colleen Bertoni <bertoni@anl.gov> after running the OvO test
suite: https://github.com/TApplencourt/OvO/

The template overload is still hidden behind an ifdef for OpenMP. In the
future we probably want to remove the ifdef but that requires further
testing.

Reviewed By: JonChesterfield, tra

Differential Revision: https://reviews.llvm.org/D89971

clang/lib/Headers/__clang_cuda_cmath.h

@@ -174,6 +174,9 @@ __DEVICE__ float sinh(float __x) { return ::sinhf(__x); }
 __DEVICE__ float sqrt(float __x) { return ::sqrtf(__x); }
 __DEVICE__ float tan(float __x) { return ::tanf(__x); }
 __DEVICE__ float tanh(float __x) { return ::tanhf(__x); }
+__DEVICE__ float remquo(float __n, float __d, int *__q) {
+  return ::remquof(__n, __d, __q);
+}
 
 // Notably missing above is nexttoward.  We omit it because
 // libdevice doesn't provide an implementation, and we don't want to be in the