WL#1163 (Make spatial code separable)
fixes before the push


include/my_global.h:
  Temporary place for these defines
include/mysqld_error.h:
  ER_FEATURE_DISABLED definition
sql/item_geofunc.cc:
  #ifdef HAVE_SPATIAL moved to the better place
sql/share/english/errmsg.txt:
  Message for ER_FEATURE_DISABLED