Re: 2.9.2 test failures on macOS

> I have two test failures to report in git 2.9.2 on macOS:
> 
> 
> t3210-pack-refs.sh has not changed between 2.8.4 and 2.9.2.  This test passed fine with 2.8.4, but it now fails with 2.9.2 at:
> 
> not ok 26 - retry acquiring packed-refs.lock
> #	
> #		LOCK=.git/packed-refs.lock &&
> #		>"$LOCK" &&
> #		test_when_finished "wait; rm -f $LOCK" &&
> #		{
> #			( sleep 1 ; rm -f $LOCK ) &
> #		} &&
> #		git -c core.packedrefstimeout=3000 pack-refs --all --prune
> #	
> 
> ===
> 
> t3700-add.sh recently added the 'git add --chmod=-x stages an executable file with -x' test.  This test passes when run as a normal user but fails when run as root:
> 
> $ ./t3700-add.sh
> ...
> # passed all 40 test(s)
> 1..40
> 
> $ sudo ./t3700-add.sh
> ...
> not ok 39 - git add --chmod=-x stages an executable file with -x
> #	
> #		echo foo >xfoo1 &&
> #		chmod 755 xfoo1 &&
> #		git add --chmod=-x xfoo1 &&
> #		case "$(git ls-files --stage xfoo1)" in
> #		100644" "*xfoo1) echo pass;;
> #		*) echo fail; git ls-files --stage xfoo1; (exit 1);;
> #		esac
> #	
> # failed 1 among 40 test(s)
> 1..40