Support defaultDriver test with Clang+Hcc Runtime

Fix the following issues:
1.Ignore hidden arguments of kernel functions.
2.Look up both origial function name and function name with .kd postfix
when argments are retrived from module.
3.Addition, fix compiling issue of LaunchKernel test app.

Change-Id: I9400943f2f02433cb4409b19c0cac3626c2bc454

hipamd/src/hip_module.cpp

@@ -1030,19 +1030,29 @@ hipError_t ihipModuleGetFunction(TlsData *tls, hipFunction_t* func, hipModule_t
     if (!*func) return hipErrorInvalidValue;
 
     std::string name_str(name);
+    std::string namekd_str(name_str + ".kd");
+
     auto kernel = find_kernel_by_name(hmod->executable, name_str.c_str(), agent);
 
     if (kernel.handle == 0u) {
-        name_str.append(".kd");
-        kernel = find_kernel_by_name(hmod->executable, name_str.c_str(), agent);
+        kernel = find_kernel_by_name(hmod->executable, namekd_str.c_str(), agent);
     }
 
     if (kernel.handle == 0u) return hipErrorNotFound;
 
+    auto it = hmod->kernargs.find(name_str); //Look up args from the original name
+    if (it == hmod->kernargs.end()) {
+        it = hmod->kernargs.find(namekd_str); //Look up args from .kd name
+        if (it == hmod->kernargs.end()) {
+            return hipErrorNotFound;
+        }
+    }
+
     // TODO: refactor the whole ihipThisThat, which is a mess and yields the
     //       below, due to hipFunction_t being a pointer to ihipModuleSymbol_t.
+
     func[0][0] = *static_cast<hipFunction_t>(
-        Kernel_descriptor{kernel_object(kernel), name_str, hmod->kernargs[name_str]});
+        Kernel_descriptor{kernel_object(kernel), name_str, it->second});
 
     return hipSuccess;
 }