corrected offline kernel compilation on hipcc path

1. hipgenisa.sh now adds int main(){} during kernel compilation. User does not have to put it there
2. Renamed vcpy_isa.cpp to vcpy_kernel.cpp
3. Removed vcpy_isa.cu as the kernel code should be common for both paths
4. Changed Makefile and runkernel.cpp to work with above changes

Change-Id: I9f8c84706b44bb500bc493a68e959762b55a0142

samples/0_Intro/module_api/runKernel.cpp

@@ -27,12 +27,12 @@ THE SOFTWARE.
 #define SIZE LEN<<2
 
 #ifdef __HIP_PLATFORM_HCC__ 
-#define fileName "vcpy_isa.co"
+#define fileName "vcpy_kernel.co"
 #define kernel_name "ZN12_GLOBAL__N_146_Z11hello_world16grid_launch_parmPfS0__functor19__cxxamp_trampolineEiiiiiiPKfPf"
 #endif
 
 #ifdef __HIP_PLATFORM_NVCC__
-#define fileName "vcpy_isa.ptx"
+#define fileName "vcpy_kernel.ptx"
 #define kernel_name "hello_world"
 #endif
 
@@ -67,8 +67,8 @@ int main(){
     hipModuleGetFunction(&Function, Module, kernel_name);
 
 #ifdef __HIP_PLATFORM_HCC__
-    uint32_t len = LEN;
-    uint32_t one = 1;
+		uint32_t len = LEN;
+		uint32_t one = 1;
 
     std::vector<void*>argBuffer(5);
     uint32_t *ptr32_t = (uint32_t*)&argBuffer[0];