Glen Barber 227c919124 Pass WORLD_FLAGS to the gcc and xdev builds.
Building gnu/usr.bin/cc/ with '-j' set blows up quite
impressively, so add '-j1' after WORLD_FLAGS, and add
a comment explaining why '-j1' is there.

Sponsored by:	The FreeBSD Foundation
2014-02-04 16:18:38 +00:00
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