update libexec for pkgx^2 #377

Job	Run time
unavailable	17s
id	1m 17s
build (macos-latest, darwin, aarch64)	27s
build (ubuntu-latest, linux, x86-64)	1m 13s
audit (ubuntu-latest)	18s
test (darwin+aarch64)	15s
bottle (gz, linux+x86-64)	19s
audit (macos-latest)	22s
bottle (xz, linux+x86-64)	12s
bottle (xz, darwin+aarch64)	18s
bottle (gz, darwin+aarch64)	12s
test	16s
	5m 26s

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