debuginfo: Do not try to use eu-elfcompress if it does not exist

Reason: ae1ecef8 ("process-debuginfo: Do not call eu-elfcompress if it doesn't exist")
Fixes: 8682814b ("debuginfo: Try to uncompress if debugedit failed to extract sources list")

scripts/process-debuginfo.in

@@ -60,7 +60,7 @@ done
 
 timestamp=$(date --iso-8601=ns --reference="$f")
 @RPMCONFIGDIR@/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug -l .tmp/src.$$ "$f"
-if [ ! -s .tmp/src.$$ ]; then
+if [ ! -s .tmp/src.$$ ] && [ -x /usr/bin/eu-elfcompress ]; then
 	# debugedit has failed to extract sources list, possibly
 	# due to ELF compression - uncompress and try again.
 	LD_ORIGIN_PATH=/usr/bin eu-readelf -S "$f" > .tmp/sections.$$