K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-07-27T12:29:31.216848Z
K 7
svn:log
V 430
genericize target exclusion for missing external toolchain

Previously we excluded riscv from make universe / tinderbox if the
required xtoolchain package was not installed. Make that logic generic
so that we can loop over multiple architectures, in preparation to test
patches to have other architectures rely on external toolchain.

Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D11652

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