clang does not like gnu++11 that much, use c++11 instead

Change-Id: I82c3a4da388cf436ba4f5380c5833a451e28cfd5

bin/gbuild-to-ide

@@ -258,7 +258,7 @@ class VimIntegrationGenerator(IdeIntegrationGenerator):
             command += cxxflag
         command += ' -c '
         command += file
-        return command
+        return command.replace('-std=gnu++11', '-std=c++11')
 
 class KdevelopIntegrationGenerator(IdeIntegrationGenerator):
     def encode_int(self, i):