debuginfo: Create empty src/debug directories for paths with `..'

Create empty directories under `/usr/src/debug` tree for source paths
containing `..` (for example `../../src` in elfutils). This should fix
debuginfo sources for autotools builds in subdir.

Fixes: https://bugzilla.altlinux.org/39175

scripts/process-debuginfo.in

@@ -96,11 +96,16 @@ fi
 mkdir -p .debuginfo/src/"${f%/*}"
 awk 'BEGIN{RS="\0";ORS="\n"}{print}' .tmp/src.$$ |LC_ALL=C sort -u |
 while read -r src; do
-	[ -f "$RPM_BUILD_DIR"/"$src" ] || continue
+	if [ -f "$RPM_BUILD_DIR"/"$src" ]; then
 		if [ ! -f ./usr/src/debug/"$src" ]; then
 			install -pD -m644 "$RPM_BUILD_DIR"/"$src" ./usr/src/debug/"$src".$$
 			mv -f ./usr/src/debug/"$src".$$ ./usr/src/debug/"$src"
 		fi
+	elif [ -d "$RPM_BUILD_DIR"/"$src" ]; then
+		mkdir -p ./usr/src/debug/"$src"
+	else
+		continue
+	fi
 	printf '%s\n' /usr/src/debug/"$src"
 done >.debuginfo/src/"$f"
 [ -s .tmp/src.$$ ] || printf '%s\n' "$f" >> .tmp/no_debug_info