Move check to PluginManager::init

Author: adurang

offload/libomptarget/OffloadRTL.cpp

@@ -40,10 +40,6 @@ void initRuntime() {
     llvm::omp::target::ompt::connectLibrary();
 #endif
 
-    if (OffloadPolicy::isOffloadDisabled()) {
-      DP("Offload is disabled. Skipping plugin initialization\n");
-      return;
-    }
     PM->init();
     PM->registerDelayedLibraries();
   }

offload/libomptarget/PluginManager.cpp

@@ -30,6 +30,11 @@ PluginManager *PM = nullptr;
 
 void PluginManager::init() {
   TIMESCOPE();
+  if (OffloadPolicy::isOffloadDisabled()) {
+    DP("Offload is disabled. Skipping plugin initialization\n");
+    return;
+  }
+
   DP("Loading RTLs...\n");
 
   // Attempt to create an instance of each supported plugin.