update libexec for pkgx^2 #324

Job	Run time
unavailable	15s
unit-tests	20s
local-edit-tests	24s
stark.com/foo@1.2.3 (linux)	1m 30s
git-clone.com (linux)	1m 29s
pyapp.com/pip (linux)	1m 23s
toolchain.com (linux)	1m 32s
pyapp.com/poetry (linux)	24s
fixups.org (linux)	1m 29s
stark.com/foo@1.2.3 (mac)	42s
git-clone.com (mac)	32s
toolchain.com (mac)	34s
pyapp.com/poetry (mac)	32s
version-transformer.com (mac)	35s
fix-machos.com (linux)	1m 28s
version-transformer.com (linux)	1m 28s
stark.com/foo (mac)	24s
stark.com/foo (linux)	1m 32s
fixups.org (mac)	40s
pyapp.com/pip (mac)	37s
fix-machos.com (mac)	41s
pc-cmake.com (mac)	40s
pc-cmake.com (linux)	1m 30s
	20m 41s

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