Port bug 1451050 - add to allowed-dupes.mn. rs=bustage-fix

mail/installer/allowed-dupes.mn

@@ -5,6 +5,10 @@
 # PLEASE DO NOT ADD MORE EXCEPTIONS TO THIS LIST
 #
 
+# browser (see bug 1451050)
+defaults/settings/pinning/pins.json
+defaults/settings/main/tippytop.json
+
 # mail
 chrome/chat/content/chat/conv.html
 chrome/classic/skin/classic/messenger/icons/accounts.svg

suite/installer/allowed-dupes.mn

@@ -4,6 +4,11 @@
 #
 # PLEASE DO NOT ADD MORE EXCEPTIONS TO THIS LIST UNLESS NECESSARY FOR THEMES OR EXTENSIONS
 #
+
+# browser (see bug 1451050)
+defaults/settings/pinning/pins.json
+defaults/settings/main/tippytop.json
+
 extensions/modern@themes.mozilla.org/chrome/modern/skin/modern/communicator/console/error-dash.gif
 chrome/classic/skin/classic/communicator/console/console-error-dash.gif
 extensions/modern@themes.mozilla.org/chrome/modern/skin/modern/communicator/console/error-caret.gif