Fix up messages & wild stab at translations for #1046

The mysterious MP_WEAK linking bug still exists, thus the new message for 'set'.

Author: nickzoic

locale/ID.po

@@ -1136,6 +1136,9 @@ msgstr ""
 msgid "RTC is not supported on this board"
 msgstr ""
 
+msgid "RTC set is not supported on this board"
+msgstr ""
+
 #: shared-bindings/_pixelbuf/PixelBuf.c
 msgid "Range out of bounds"
 msgstr ""