abuild: avoid compress man pages double

we should not compress man pages that are already compressed.

abuild.in

@@ -1410,6 +1410,7 @@ default_doc() {
 	local mandir="$subpkgdir"/usr/share/man
 	[ -d "$mandir" ] && find "$mandir" -type l \
 		-a \( -name \*.[0-8n] -o -name \*.[0-8][a-z]* \) \
+		-a \! \( -name '*.gz' -o name '*.bz2' -o name '*.xz' \) \
 		| while read symlink; do
 
 		ln -s $(readlink $symlink).gz "$symlink".gz
@@ -1417,6 +1418,7 @@ default_doc() {
 	done
 	[ -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
 
 		# Skip hardlinks removed in last iteration.