Merge branch 'rj/meson-tap-parse-fixup'

An earlier test update incorrectly lost three prerequisites on
macOS, which has been corrected.

* rj/meson-tap-parse-fixup:
  test-lib: add missing prerequisites for Darwin

t/test-lib.sh

@@ -1647,6 +1647,9 @@ uname_s=$(uname -s)
 case $uname_s in
 Darwin)
 	test_set_prereq MACOS
+	test_set_prereq POSIXPERM
+	test_set_prereq BSLASHPSPEC
+	test_set_prereq EXECKEEPSPID
 	;;
 *MINGW*)
 	# Windows has its own (incompatible) sort and find