update libexec for pkgx^2 #366

Job	Run time
unavailable	24s
build (ubuntu-latest, linux, x86-64)	1m 18s
id	1m 44s
build (macos-latest, darwin, aarch64)	36s
audit (macos-latest)	30s
bottle (gz, linux+x86-64)	26s
bottle (gz, darwin+aarch64)	18s
bottle (xz, darwin+aarch64)	18s
test (darwin+aarch64)	33s
audit (ubuntu-latest)	30s
test	31s
bottle (xz, linux+x86-64)	25s
	7m 33s

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