abuild: minor speed improvement in symlink compression

instead of forking stat once force every file with one file argument,
we fork it once with all the files as arg. This reduces number of forks.

abuild.in

@@ -1419,7 +1419,7 @@ default_doc() {
 	[ -d "$mandir" ] && find "$mandir" -type f \
 		-a \( -name \*.[0-8n] -o -name \*.[0-8][a-z]* \) \
 		-a \! \( -name '*.gz' -o -name '*.bz2' -o -name '*.xz' \) \
-		-exec stat -c "%i %n" \{\} \; | while read inode name; do
+		-exec stat -c "%i %n" \{\} \+ | while read inode name; do
 
 		# Skip hardlinks removed in last iteration.
 		[ -f "$name" ] || continue
@@ -1428,7 +1428,7 @@ default_doc() {
 		find "$mandir" -type f -links +1 \
 			-a \( -name \*.[0-8n] -o -name \*.[0-8][a-z]* \) \
 			-a \! \( -name '*.gz' -o -name '*.bz2' -o -name '*.xz' \) \
-			-exec stat -c "%i %n" \{\} \; | while read linode lname; do
+			-exec stat -c "%i %n" \{\} \+ | while read linode lname; do
 			if [ "$linode" = "$inode" -a "$lname" != "$name" ]; then
 				islink=1
 				rm -f "$lname"