t7812: add missing redirects

Two tests in t7812, added in 8a599983 ("grep: stess test PCRE v2 on
invalid UTF-8 data", 2019-07-26), were missing redirects, failing to
actually test the produced output.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7812-grep-icase-non-ascii.sh

@@ -70,14 +70,14 @@ test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep ASCII from invalid UT
 test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep non-ASCII from invalid UTF-8 data' '
 	git grep -h "æ" invalid-0x80 >actual &&
 	test_cmp expected actual &&
-	git grep -h "(*NO_JIT)æ" invalid-0x80 &&
+	git grep -h "(*NO_JIT)æ" invalid-0x80 >actual &&
 	test_cmp expected actual
 '
 
 test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep non-ASCII from invalid UTF-8 data with -i' '
 	test_might_fail git grep -hi "Æ" invalid-0x80 >actual &&
 	test_cmp expected actual &&
-	test_must_fail git grep -hi "(*NO_JIT)Æ" invalid-0x80 &&
+	test_must_fail git grep -hi "(*NO_JIT)Æ" invalid-0x80 >actual &&
 	test_cmp expected actual
 '