Makefile.am: SUBDIRS is automagic
Makefile.am: SUBDIRS is automagic

DIST_SUBDIRS should be used for corner cases only, not for conditional
SUBDIRS:

  If `SUBDIRS' is defined conditionally using Automake conditionals,
  Automake will define `DIST_SUBDIRS' automatically from the possible
  values of `SUBDIRS' in all conditions.

Signed-off-by: Quentin Glidic <241385a0e41ea713327e189bce1062decf7c1eb5@sardemff7.net>

Gnurou/weston,Tarnyko/weston-xdg_surface_present,udoprog/weston,sir-murray/weston,sir-murray/weston,eyolfson/weston,Fantu/compositor-spice,xorgy/weston,giucam/weston,giucam/weston,krezovic/weston,Fantu/compositor-spice,jonnylamb/weston,krezovic/weston,mchalupa/weston,Fantu/compositor-spice,xorgy/weston,jonnylamb/weston,udoprog/weston,mchalupa/weston,eyolfson/weston,kwm81/weston,Tarnyko/weston-xdg_surface_present,kwm81/weston,Gnurou/weston