[PATCH] tests: mark two failing tests under FAIL_PREREQS

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Fix a couple of tests that would potentially fail under
GIT_TEST_FAIL_PREREQS=true.

I missed these when annotating other tests in dfe1a17df9 ("tests: add
a special setup where prerequisites fail", 2019-05-13) because on my
system I can only reproduce this failure when I run the tests as
"root", since the tests happen to depend on whether we can fall back
on GECOS info or not. I.e. they'd usually fail to look up the ident
info anyway, but not always.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 t/t0007-git-var.sh          | 2 +-
 t/t7502-commit-porcelain.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/t0007-git-var.sh b/t/t0007-git-var.sh
index 5868a87352..1f600e2cae 100755
--- a/t/t0007-git-var.sh
+++ b/t/t0007-git-var.sh
@@ -17,7 +17,7 @@ test_expect_success 'get GIT_COMMITTER_IDENT' '
 	test_cmp expect actual
 '
 
-test_expect_success !AUTOIDENT 'requested identites are strict' '
+test_expect_success !FAIL_PREREQS,!AUTOIDENT 'requested identites are strict' '
 	(
 		sane_unset GIT_COMMITTER_NAME &&
 		sane_unset GIT_COMMITTER_EMAIL &&
diff --git a/t/t7502-commit-porcelain.sh b/t/t7502-commit-porcelain.sh
index 5733d9cd34..14c92e4c25 100755
--- a/t/t7502-commit-porcelain.sh
+++ b/t/t7502-commit-porcelain.sh
@@ -402,7 +402,7 @@ echo editor started >"$(pwd)/.git/result"
 exit 0
 EOF
 
-test_expect_success !AUTOIDENT 'do not fire editor when committer is bogus' '
+test_expect_success !FAIL_PREREQS,!AUTOIDENT 'do not fire editor when committer is bogus' '
 	>.git/result &&
 
 	echo >>negative &&
-- 
2.22.0.455.g172b71a6c5