The macfs, macostools, and plistlib should not be expected to run

beyond Mac OS and Darwin.  I'm not even sure they should be run on
Darwin, but I'll let someone more knowledgable on that tell us.

Lib/test/regrtest.py

@@ -566,11 +566,14 @@ _expectations = {
         test_imgfile
         test_largefile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_mhlib
         test_mpz
         test_nis
         test_openpty
         test_ossaudiodev
+        test_plistlib
         test_poll
         test_posix
         test_pty
@@ -593,9 +596,12 @@ _expectations = {
         test_imgfile
         test_largefile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_nis
         test_ntpath
         test_ossaudiodev
+        test_plistlib
         test_socketserver
         test_sunaudiodev
         test_unicode_file
@@ -655,10 +661,13 @@ _expectations = {
         test_imgfile
         test_largefile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_minidom
         test_nis
         test_ntpath
         test_openpty
+        test_plistlib
         test_pyexpat
         test_sax
         test_socketserver
@@ -677,10 +686,13 @@ _expectations = {
         test_imgfile
         test_largefile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_minidom
         test_nis
         test_ntpath
         test_openpty
+        test_plistlib
         test_pyexpat
         test_sax
         test_socketserver
@@ -703,10 +715,13 @@ _expectations = {
         test_largefile
         test_linuxaudiodev
         test_locale
+        test_macfs
+        test_macostools
         test_minidom
         test_nis
         test_ntpath
         test_openpty
+        test_plistlib
         test_pyexpat
         test_queue
         test_sax
@@ -739,10 +754,13 @@ _expectations = {
         test_largefile
         test_linuxaudiodev
         test_locale
+        test_macfs
+        test_macostools
         test_mmap
         test_nis
         test_ntpath
         test_openpty
+        test_plistlib
         test_poll
         test_popen2
         test_pty
@@ -799,8 +817,11 @@ _expectations = {
         test_gzip
         test_imgfile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_mpz
         test_openpty
+        test_plistlib
         test_socketserver
         test_zipfile
         test_zlib
@@ -820,10 +841,13 @@ _expectations = {
         test_largefile
         test_linuxaudiodev
         test_locale
+        test_macfs
+        test_macostools
         test_minidom
         test_nis
         test_ntpath
         test_openpty
+        test_plistlib
         test_pyexpat
         test_sax
         test_socketserver
@@ -846,10 +870,13 @@ _expectations = {
         test_largefile
         test_linuxaudiodev
         test_locale
+        test_macfs
+        test_macostools
         test_mhlib
         test_mmap
         test_mpz
         test_nis
+        test_plistlib
         test_poll
         test_popen2
         test_resource
@@ -871,9 +898,12 @@ _expectations = {
         test_largefile
         test_linuxaudiodev
         test_locale
+        test_macfs
+        test_macostools
         test_mpz
         test_nis
         test_ossaudiodev
+        test_plistlib
         test_socketserver
         test_sunaudiodev
         test_unicode_file
@@ -894,11 +924,14 @@ _expectations = {
         test_imgfile
         test_largefile
         test_linuxaudiodev
+        test_macfs
+        test_macostools
         test_mhlib
         test_mmap
         test_nis
         test_openpty
         test_ossaudiodev
+        test_plistlib
         test_pty
         test_resource
         test_signal