[COMMITTED] tests: Use /bin/sh instead of /bin/ls as always there binary

[Mark Wielaard <mark@klomp.org>]

run-debuginfod-query-retry.sh would fail when /bin/ls wasn't available.
Use /bin/sh instead which really is always available.

GNU Guix doesn't have any other standard binary in /bin except for sh.

Signed-off-by: Mark Wielaard <mark@klomp.org>
---
 tests/ChangeLog                     | 4 ++++
 tests/run-debuginfod-query-retry.sh | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/ChangeLog b/tests/ChangeLog
index 82061c6e..c97ed52e 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,7 @@
+2021-12-17  Mark Wielaard  <mark@klomp.org>
+
+	* run-debuginfod-query-retry.sh: Use /bin/sh instead of /bin/ls.
+
 2021-12-09  Frank Ch. Eigler  <fche@redhat.com>
 
 	* debuginfod-subr.sh (xfail): New proc.
diff --git a/tests/run-debuginfod-query-retry.sh b/tests/run-debuginfod-query-retry.sh
index c9192510..0cfdba92 100755
--- a/tests/run-debuginfod-query-retry.sh
+++ b/tests/run-debuginfod-query-retry.sh
@@ -25,7 +25,7 @@ unset VALGRIND_CMD
 ########################################################################
 # set up tests for retrying failed queries.
 retry_attempts=`(testrun env DEBUGINFOD_URLS=http://255.255.255.255/JUNKJUNK DEBUGINFOD_RETRY_LIMIT=10 DEBUGINFOD_VERBOSE=1 DEBUGINFOD_CACHE_PATH=${PWD}/.client_cache \
-        ${abs_top_builddir}/debuginfod/debuginfod-find debuginfo /bin/ls || true) 2>&1 >/dev/null \
+        ${abs_top_builddir}/debuginfod/debuginfod-find debuginfo /bin/sh || true) 2>&1 >/dev/null \
         | grep -c 'Retry failed query'`
 if [ $retry_attempts -ne 10 ]; then
     echo "retry mechanism failed."
-- 
2.18.4