Bug 1508248 - Update in-tree bugzilla metadata to use 'Firefox Build System :: Mach Core' for mach files r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D12278

--HG--
extra : moz-landing-system : lando

moz.build

@@ -29,7 +29,7 @@ with Files('*configure*'):
     BUG_COMPONENT = ('Firefox Build System', 'General')
 
 with Files('mach'):
-    BUG_COMPONENT = ('Core', 'mach')
+    BUG_COMPONENT = ('Firefox Build System', 'Mach Core')
 
 with Files('*moz*'):
     BUG_COMPONENT = ('Firefox Build System', 'General')

python/moz.build

@@ -12,7 +12,7 @@ with Files('devtools/**'):
     BUG_COMPONENT = ('DevTools', 'General')
 
 with Files('mach/**'):
-    BUG_COMPONENT = ('Core', 'mach')
+    BUG_COMPONENT = ('Firefox Build System', 'Mach Core')
 
 with Files('mozboot/**'):
     BUG_COMPONENT = ('Firefox Build System', 'Bootstrap Configuration')