K 10
svn:author
V 4
ngie
K 8
svn:date
V 27
2019-04-06T05:34:51.605410Z
K 7
svn:log
V 559
Build libclang_rt.profile as a cross-tools dependency

Long story short, make tinderbox was failing because it was looking for
libclang_rt.profile under a different path from there make libraries installs
it. Add a new MK knob to control building `lib/libclang_rt/profile` in
buildworld: MK_COVERAGE_SUPPORT. MK_COVERAGE_SUPPORT is to
`lib/libclang_rt/profile`, as MK_TESTS_SUPPORT is to lib/atf/...: it serves to
separate out building infrastructure from the resulting code.

This commit is untested, but I'm hopeful that it's a move in the right
direction.

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