Use print() function in both Python 2 and Python 3 (#12467)

The current code is a syntax error in Python 3.

The proposed code works as expected in both Python 2 and Python 3.

samples/client/petstore/javascript-closure-angular/compile.py

@@ -53,8 +53,8 @@ def main():
     for name, targetFiles in targets.iteritems():
         errors = checkForCompilerErrors(targetFiles)
         if errors:
-            print "Compiler errors when building %s" % name
-            print errors
+            print("Compiler errors when building %s" % name)
+            print(errors)
 
     for name, targetFiles in targets.iteritems():
         compile("%s.compiled.js" % name, targets[name])