[SYCL] ocloc64.dll added to win_proxy_loader.cpp. (#8937)

The online_compiler calls `pi::loadOsPluginLibrary("ocloc64.dll")` but
the proxy loader doesn't know about that DLL. Adding it. A test exists
already to test this, but it has an unmet dependency and I don't think
it's ever actually been run.

Author: cperkinsintel

sycl/win_proxy_loader/win_proxy_loader.cpp

@@ -110,13 +110,15 @@ std::string getCurrentDSODir() {
 #define __SYCL_ESIMD_EMULATOR_PLUGIN_NAME "pi_esimd_emulator.dll"
 #define __SYCL_HIP_PLUGIN_NAME "libpi_hip.dll"
 #define __SYCL_UNIFIED_RUNTIME_PLUGIN_NAME "pi_unified_runtime.dll"
+#define __SYCL_ONLINE_COMPILER_LIBRARY_NAME "ocloc64.dll"
 #else // llvm-mingw
 #define __SYCL_OPENCL_PLUGIN_NAME "libpi_opencl.dll"
 #define __SYCL_LEVEL_ZERO_PLUGIN_NAME "libpi_level_zero.dll"
 #define __SYCL_CUDA_PLUGIN_NAME "libpi_cuda.dll"
 #define __SYCL_ESIMD_EMULATOR_PLUGIN_NAME "libpi_esimd_emulator.dll"
 #define __SYCL_HIP_PLUGIN_NAME "libpi_hip.dll"
 #define __SYCL_UNIFIED_RUNTIME_PLUGIN_NAME "libpi_unified_runtime.dll"
+#define __SYCL_ONLINE_COMPILER_LIBRARY_NAME "ocloc64.dll"
 #endif
 
 // ------------------------------------
@@ -168,6 +170,9 @@ void preloadLibraries() {
   std::string ur_path = LibSYCLDir + __SYCL_UNIFIED_RUNTIME_PLUGIN_NAME;
   dllMap.emplace(ur_path, LoadLibraryA(ur_path.c_str()));
 
+  std::string ocloc_path = __SYCL_ONLINE_COMPILER_LIBRARY_NAME;
+  dllMap.emplace(ocloc_path, LoadLibraryA(ocloc_path.c_str()));
+
   // Restore system error handling.
   (void)SetErrorMode(SavedMode);
   if (!SetDllDirectoryA(nullptr)) {