Enabled gcc for hip host code (#1214)

* Enabled gcc for hip host code

* Adding tests for hip code + (gcc & g++), without kernels

* Excluding nvcc platforms for gcc and g++ tests + Addressing review comments

* minor code clean-up

* Add rocm include path

* Added relative path for library

* Hiding non supported functions for gcc

* Incorporating review comments

tests/src/g++/hipMalloc.cpp

@@ -1,7 +1,34 @@
+/*
+ * Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANNTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INNCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANNY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER INN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR INN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * */
+
+/* HIT_START
+ * BUILD_CMD: hipMalloc %cxx -D__HIP_PLATFORM_HCC__ -I%hip-path/include -I/opt/rocm/include %S/%s -Wl,--rpath=%hip-path/lib %hip-path/lib/libhip_hcc.so -o %T/%t -std=c++11 EXCLUDE_HIP_PLATFORM nvcc
+ * TEST: %t EXCLUDE_HIP_PLATFORM nvcc
+ * HIT_END
+ */
+
+
 #include <hip/hip_runtime_api.h>
 #include <iostream>
 
 int main() {
     int* Ad;
     hipMalloc((void**)&Ad, 1024);
+    std::cout<<"PASSED!"<<std::endl;   
 }