patcht5537: adjust test_oid label

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> We recently switched to using Perl instead of `sed` in the httpd-based
> tests. Let's reflect that in the label we give the corresponding commit
> hashes.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>     Follow-up for "ci: upgrade to the latest Azure Pipelines agent pools"
>     
>     This is a companion patch for https://github.com/git/git/pull/714,
>     adding a patch that would not apply to maint but applies to master. It
>     is intended to be applied on top of the merge that pulls in the agent
>     pool upgrade (which in turn is intended to be applied on top of maint).
>     
>     Changes since v1:
>     
>      * Rebased onto master, as it now has all the building blocks needed for
>        this.

>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-717%2Fdscho%2Fazure-pipelines-latest-pools-test_oid-v2
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-717/dscho/azure-pipelines-latest-pools-test_oid-v2
> Pull-Request: https://github.com/git/git/pull/717
>
> Range-diff vs v1:
>
>  1:  79ad5eaa75b ! 1:  a6e4e9cc6ad t5537: adjust test_oid label
>      @@ -30,4 +30,4 @@
>       +	printf "$(test_oid perl)" \
>        	       "$(git -C "$REPO" rev-parse HEAD)" \
>        	       "$(git -C "$REPO" rev-parse HEAD^)" \
>      - 	       >"$HTTPD_ROOT_PATH/one-time-perl" &&
>      + 	       >"$HTTPD_ROOT_PATH/one-time-sed" &&
>
>
>  t/t5537-fetch-shallow.sh | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/t/t5537-fetch-shallow.sh b/t/t5537-fetch-shallow.sh
> index 9e16512fe31..287d2c336be 100755
> --- a/t/t5537-fetch-shallow.sh
> +++ b/t/t5537-fetch-shallow.sh
> @@ -17,8 +17,8 @@ test_expect_success 'setup' '
>  	commit 4 &&
>  	git config --global transfer.fsckObjects true &&
>  	test_oid_cache <<-EOF
> -	sed sha1:s/0034shallow %s/0036unshallow %s/
> -	sed sha256:s/004cshallow %s/004eunshallow %s/
> +	perl sha1:s/0034shallow %s/0036unshallow %s/
> +	perl sha256:s/004cshallow %s/004eunshallow %s/
>  	EOF
>  '
>  
> @@ -243,7 +243,7 @@ test_expect_success 'shallow fetches check connectivity before writing shallow f
>  	# with an empty packfile. This is done by refetching with a shorter
>  	# depth (to ensure that the packfile is empty), and overwriting the
>  	# shallow line in the response with the unshallow line we want.
> -	printf "$(test_oid sed)" \
> +	printf "$(test_oid perl)" \
>  	       "$(git -C "$REPO" rev-parse HEAD)" \
>  	       "$(git -C "$REPO" rev-parse HEAD^)" \
>  	       >"$HTTPD_ROOT_PATH/one-time-sed" &&
>
> base-commit: 2f268890c2cd2f115424936bbee27f8269080e5e