SWDEV-283267 - HIPRTC Pass COMGR correct msvc flags

On Windows, to enable comgr and hiprtc to enable compilation,
provide the correct target flags. Otherwise comgr cannot
figure out which platform to compile for.

Change-Id: I6426e518c8d695342cb49df0ebdeac0437da83df


[ROCm/clr commit: 58246c78d7]

projects/clr/hipamd/src/hip_rtc.cpp

@@ -295,6 +295,11 @@ hiprtcResult hiprtcCompileProgram(hiprtcProgram prog, int numOptions, const char
   oarr.push_back("-include hiprtc_runtime.h");
   oarr.push_back("-std=c++14");
   oarr.push_back("-nogpuinc");
+#ifdef _WIN32
+  oarr.push_back("-target x86_64-pc-windows-msvc");
+  oarr.push_back("-fms-extensions");
+  oarr.push_back("-fms-compatibility");
+#endif
 #endif
 
   transformOptions(oarr, program);