Set up build system and disassembly for gc-us (#1982)

* Build gc-us

* Set up gc-us disassembly

* Don't disasm unchanged overlays

* Fix gc-eu-mq BSS

* romalign link_animetion for NTSC

* Explicitly set CPP defines to 0/1

* Add #ifs to segment_symbols.h

* Add sButtonTextures now

* Fix message _SHIFTL usage

* Don't ifdef LANGUAGE_MAX

include/message_data_fmt.h

@@ -5,9 +5,6 @@
 #include "z64item.h" // For item ids
 #include "sfx.h" // For sfx ids
 
-#define TEXT_LANG_US_JP 0
-#define TEXT_LANG_EU    1
-
 /*
  * Text control characters
  */