Added support for constant memory

1. Added support for constant memory
2. Added test which uses memcpytosymbol for constant memory
3. Corrected code error on nvcc path

Change-Id: I2ab69f516832bf7a037132ac81273ea6f5107401

include/hip/hcc_detail/host_defines.h

@@ -47,7 +47,7 @@ THE SOFTWARE.
  */
 // _restrict is supported by the compiler
 #define __shared__     tile_static
-#define __constant__   __attribute__((address_space(2)))
+#define __constant__   __attribute__((address_space(1)))
 
 #else
 // Non-HCC compiler

include/hip/nvcc_detail/hip_runtime_api.h

@@ -741,7 +741,7 @@ inline static hipError_t hipDeviceGetPCIBusId(int *pciBusId,int len,hipDevice_t
 
 inline static hipError_t hipDeviceGetLimit(size_t *pValue, hipLimit_t limit)
 {
-    return hipCUDAErrorTohipError(cudaDeviceGetLimit(pValue, limit);
+    return hipCUDAErrorTohipError(cudaDeviceGetLimit(pValue, limit));
 }
 
 inline static hipError_t hipDeviceTotalMem(size_t *bytes,hipDevice_t device)