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/rocket_hideout_b2f.asm

@@ -1,15 +1,15 @@
-_RocketHideout2BattleText2: ; 820bb (20:60bb)
+_RocketHideout2BattleText2:: ; 820bb (20:60bb)
 	text "BOSS said you can"
 	line "see GHOSTs with"
 	cont "the SILPH SCOPE!"
 	done
 
-_RocketHideout2EndBattleText2: ; 820ef (20:60ef)
+_RocketHideout2EndBattleText2:: ; 820ef (20:60ef)
 	text "I"
 	line "surrender!"
 	prompt
 
-_RocketHideout2AfterBattleTxt2: ; 820fd (20:60fd)
+_RocketHideout2AfterBattleTxt2:: ; 820fd (20:60fd)
 	text "The TEAM ROCKET"
 	line "HQ has 4 basement"
 	cont "floors. Can you"