Allow warnings in successful build

Author: ShukantPal

common/config/rush/command-line.json

@@ -51,6 +51,17 @@
       "ignoreMissingScript": true,
 
       "allowWarningsInSuccessfulBuild": false
+    },
+    {
+      "commandKind": "bulk",
+      "name": "build",
+      "summary": "Build all projects that haven't been built, or have changed since they were last built",
+      "description": "This command is similar to \"rush rebuild\", except that \"rush build\" performs...",
+      "safeForSimultaneousRushProcesses": false,
+      "enableParallelism": true,
+      "ignoreDependencyOrder": false,
+      "ignoreMissingScript": false,
+      "allowWarningsInSuccessfulBuild": true
     }
     //
     // {