Fixing .headers output file name to fix IDL dependencies, which should fix the flames. r=sspitzer

mailnews/extensions/mailviews/macbuild/mailviewsIDL.xml

@@ -705,7 +705,7 @@
                 <SETTING><NAME>MWProject_X86_minsize</NAME><VALUE>4</VALUE></SETTING>
                 <SETTING><NAME>MWProject_X86_importlib</NAME><VALUE></VALUE></SETTING>
                 <PANELDATA><NAME>xpidl Settings</NAME><VALUE>
-                    000100010101106D7367736D696D652E68656164657273727373000000000000
+                    000100010101116D61696C76696577732E686561646572737373000000000000
                     0000000000000000
                 </VALUE></PANELDATA>
             </SETTINGLIST>