Get rid of globals.asm. Use ::s to export labels between objects.

globals.asm was a hack that:
- gave rgbasm an extra 100k lines to read
- increased reliance on the python preprocessor
- made the makefile a mess
- gave object creation an extra step
- wasn't even necessary

This speeds up build time by at least a third.

text/maps/bruno.asm

@@ -1,4 +1,4 @@
-_BrunoBeforeBattleText: ; 86749 (21:6749)
+_BrunoBeforeBattleText:: ; 86749 (21:6749)
 	text "I am BRUNO of"
 	line "the ELITE FOUR!"
 
@@ -20,18 +20,18 @@ _BrunoBeforeBattleText: ; 86749 (21:6749)
 	para "Hoo hah!"
 	done
 
-_BrunoEndBattleText: ; 86805 (21:6805)
+_BrunoEndBattleText:: ; 86805 (21:6805)
 	text "Why?"
 	line "How could I lose?"
 	prompt
 
-_BrunoAfterBattleText: ; 8681d (21:681d)
+_BrunoAfterBattleText:: ; 8681d (21:681d)
 	text "My job is done!"
 	line "Go face your next"
 	cont "challenge!"
 	done
 
-_UnnamedText_763d2: ; 8684b (21:684b)
+_UnnamedText_763d2:: ; 8684b (21:684b)
 	text "Someone's voice:"
 	line "Don't run away!"
 	done