NVCC improvements.

- Complete translation tables for cudaError <-> hipError_t.
- Remove some odd errors that were not correctly translated or not used.
- Add HIPCHECK_API to test infrastructure.  Used for negative testing
  an API ; if a mismatch occurs it shows the expected return error
  code.  Can also print a warning rather than error.
- Enable hipMemoryAllocate on NV system, and review error coded.
- Add hipErrorName to nvcc.

Change-Id: I680427dcf32a5796d5913cf9e7f3b4c6f6b91599

Conflicts:
	tests/src/CMakeLists.txt

Bug fixes and improved docs for hipFree and hipHostFree.

    - Passing NULL pointer initialized runtime and return hipSuccess
      (not an error like before).
    - add negative test for this. (hipMemoryAllocate, improved)
    - Match NVCC errors for invalid pointers, add to test.
    - Update hipFree and hipHostFree docs.
    - hipGetDevicePointer always set *devicePointer=NULL, even for
      invalid flags.
    - Gate shared memory usage on specific HCC work-week.

Change-Id: I533b4fd3280a3d6cdbf05eb768976f0c7506c012

include/hcc_detail/hip_runtime_api.h

@@ -764,28 +764,32 @@ hipError_t hipHostUnregister(void* hostPtr) ;
 /**
  *  @brief Free memory allocated by the hcc hip memory allocation API.
  *  This API performs an implicit hipDeviceSynchronize() call.
+ *  If pointer is NULL, the hip runtime is initialized and hipSuccess is returned.
  *
  *  @param[in] ptr Pointer to memory to be freed
- *  @return #hipSuccess, #hipErrorMemoryFree
+ *  @return #hipSuccess 
+ *  @return #hipErrorInvalidDevicePointer (if pointer is invalid, including host pointers allocated with hipHostMalloc)
  */
 hipError_t hipFree(void* ptr);
 
 
 
 /**
- *  @brief Free memory allocated by the hcc hip host memory allocation API
+ *  @brief Free memory allocated by the hcc hip host memory allocation API.  [Deprecated.]
  *
- *  @param[in] ptr Pointer to memory to be freed
- *  @return #hipSuccess, #hipErrorMemoryFree
+ *  @see hipHostFree
  */
 hipError_t hipFreeHost(void* ptr) __attribute__((deprecated("use hipHostFree instead")))  ;
 
 
 /**
  *  @brief Free memory allocated by the hcc hip host memory allocation API
+ *  This API performs an implicit hipDeviceSynchronize() call.
+ *  If pointer is NULL, the hip runtime is initialized and hipSuccess is returned.
  *
  *  @param[in] ptr Pointer to memory to be freed
- *  @return #hipSuccess, #hipErrorMemoryFree
+ *  @return #hipSuccess, 
+ *          #hipErrorInvalidValue (if pointer is invalid, including device pointers allocated with hipMalloc)
  */
 hipError_t hipHostFree(void* ptr);