fix(debugging): Dispatch messages to global GCD queue

Incoming debugger messages could cause a breakpoint to be
triggered (e.g. invalid evaluation expression with break on
exceptions turned on). We deadlocked when we didn't dispatch
them and didn't release the current thread, because no other
debugger message could be processed.

src/debugging/TNSDebugging.h

@@ -376,16 +376,18 @@ static void TNSEnableRemoteInspector(int argc, char** argv,
       }
       return ^(NSString* message, NSError* error) {
         if (message) {
-            // Keep a working copy for calling into the VM after releasing inspectorLock
-            TNSRuntimeInspector* tempInspector = nil;
-            @synchronized(inspectorLock()) {
-                tempInspector = inspector;
-            }
+            dispatch_async(dispatch_get_global_queue(0, 0), ^{
+              // Keep a working copy for calling into the VM after releasing inspectorLock
+              TNSRuntimeInspector* tempInspector = nil;
+              @synchronized(inspectorLock()) {
+                  tempInspector = inspector;
+              }
 
-            if (tempInspector) {
-                // NSLog(@"NativeScript Debugger receiving: %@", message);
-                [tempInspector dispatchMessage:message];
-            }
+              if (tempInspector) {
+                  // NSLog(@"NativeScript Debugger receiving: %@", message);
+                  [tempInspector dispatchMessage:message];
+              }
+            });
         } else {
             clearInspector();