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/safari_zone_rest_house_2.asm

@@ -1,4 +1,4 @@
-_SafariZoneRestHouse2Text1: ; 85a2f (21:5a2f)
+_SafariZoneRestHouse2Text1:: ; 85a2f (21:5a2f)
 	text "Tossing ROCKs at"
 	line "#MON might"
 	cont "make them run,"
@@ -6,13 +6,13 @@ _SafariZoneRestHouse2Text1: ; 85a2f (21:5a2f)
 	cont "easier to catch."
 	done
 
-_SafariZoneRestHouse2Text2: ; 85a7a (21:5a7a)
+_SafariZoneRestHouse2Text2:: ; 85a7a (21:5a7a)
 	text "Using BAIT will"
 	line "make #MON"
 	cont "easier to catch."
 	done
 
-_SafariZoneRestHouse2Text3: ; 85aa6 (21:5aa6)
+_SafariZoneRestHouse2Text3:: ; 85aa6 (21:5aa6)
 	text "I hiked a lot, but"
 	line "I didn't see any"
 	cont "#MON I wanted."