Integrate macperl patches #16926 and #16938;

Integrate macperl patches #16926 and #16938;

Big MacPerl Testing Patch No. 2

Big MacPerl Testing Patch No. 3

p4raw-id: //depot/perl@16942
p4raw-integrated: from //depot/macperl@16937 'copy in'
	lib/Devel/SelfStubber.pm lib/Devel/SelfStubber.t
	lib/File/DosGlob.t lib/File/Path.t lib/File/Spec/t/Spec.t
	lib/File/Temp.pm lib/FindBin.t lib/Tie/File/t/09_gen_rs.t
	lib/lib.t t/comp/use.t utils/dprofpp.PL utils/splain.PL
	(@16123..) t/lib/MakeMaker/Test/Utils.pm (@16230..)
	lib/diagnostics.t (@16646..) lib/ExtUtils/t/00setup_dummy.t
	lib/ExtUtils/t/Command.t (@16730..) lib/lib_pm.PL (@16926..)
	lib/ExtUtils/MM_MacOS.pm lib/Test/Harness/Straps.pm
	lib/Test/Harness/t/callback.t
	lib/Test/Harness/t/strap-analyze.t
	lib/Test/Harness/t/test-harness.t (@16929..)
p4raw-integrated: from //depot/macperl@16926 'merge in' lib/English.t
	(@16123..) ext/DynaLoader/DynaLoader_pm.PL (@16868..)