Workaround missing --json in "dnf repolist" (#1377)

Fixes #1376

Author: kwk

scripts/perf/lib.sh

@@ -107,7 +107,7 @@ function build_test_suite() {
     # Install and enable the repository that provides the LLVM Toolchain
     if [[ -n "${COPR_PROJECT}" ]]; then
         dnf copr enable -y ${COPR_OWNER}/${COPR_PROJECT} ${CHROOT}
-        local repo_file=$(dnf repoinfo --json *${COPR_PROJECT}* | jq -r ".[0].repo_file_path")
+        local repo_file=$(dnf repoinfo '*${COPR_PROJECT}*' 2>/dev/null | grep -ioP 'Repo-filename\s*:\s*\K.*' | head -n1)
         distname=$(rpm --eval "%{?fedora:fedora}%{?rhel:rhel}")
         sed -i "s/\$distname/$distname/g" $repo_file