Move the CLI corefx dependencies from RC2 to RC3 - rc3-24113-00.

- Disable crossgen for windows.Tracked by - https://github.com/dotnet/cli/issues/3059
- And also fix #2974

tools/MultiProjectValidator/project.json

@@ -5,7 +5,8 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "NETStandard.Library": "1.5.0-rc2-24027",
+    "NETStandard.Library": "1.5.0-rc3-24113-00",
+    "Microsoft.NETCore.Runtime": "1.0.2-rc3-24113-00",
     "Microsoft.DotNet.ProjectModel": {
       "target": "project"
     },
@@ -14,7 +15,7 @@
     }
   },
   "frameworks": {
-    "netstandardapp1.5": {
+    "netcoreapp1.0": {
       "imports": [
         "dnxcore50"
       ]