utils/test-pkg: proper output on host without jq installed

On host without jq installed, test-pkg's output is as following:

$ ./utils/test-pkg -p mmc-utils
                    bootlin-armv5-uclibc [1/6]: which: no jq in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/lib/llvm/14/bin:/usr/lib/llvm/13/bin:/usr/lib64/opencascade/bin)
JQ IS
OK
                     bootlin-armv7-glibc [2/6]: which: no jq in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/lib/llvm/14/bin:/usr/lib/llvm/13/bin:/usr/lib64/opencascade/bin)
JQ IS
OK
                   bootlin-armv7m-uclibc [3/6]: which: no jq in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/lib/llvm/14/bin:/usr/lib/llvm/13/bin:/usr/lib64/opencascade/bin)
...

Since test-pkg handles this case we can hide this error message and have
proper output:

$ ./utils/test-pkg -p mmc-utils
                    bootlin-armv5-uclibc [1/6]: OK
                     bootlin-armv7-glibc [2/6]: OK
                   bootlin-armv7m-uclibc [3/6]: OK

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 09ac5a9e18e96ba6d3cd13e5e8d34aeccfcb603d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

utils/test-pkg

@@ -201,7 +201,7 @@ build_one() {
 
     # Validate that we generate proper json as show-info
     { tput smso; printf '>>> Running show-info\n'; tput rmso; } >> "${dir}/logfile" 2> /dev/null;
-    JQ="$(which jq)"
+    JQ="$(which jq 2> /dev/null)"
     if [ -z "${JQ}" ]; then
         make O="${dir}" host-jq >> "${dir}/logfile" 2>&1
         JQ="${dir}/host/bin/jq"