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mkinitfs: fix kernel module dependency checking

The awk script parses modules.dep which contains only relative modulenames.
Fix the code to feed only relative names to the awk script so we get the
real dependencies out. Also add "prepend" to awk so it outputs absolute
paths suitable for copying the files.

--- a/mkinitfs.in

+++ b/mkinitfs.in

@@ -76,7 +76,7 @@

 }

 find_kmod_deps() {

-	awk -v modulesdep="$basedir/lib/modules/$kernel/modules.dep" '

+	awk -v prepend="$basedir/lib/modules/$kernel/" -v modulesdep="$basedir/lib/modules/$kernel/modules.dep" '

 function recursedeps(k,		j, dep) {

 	if (k in visited)

 		return;

@@ -84,7 +84,7 @@

 	split(deps[k], dep, " ");

 	for (j in dep)

 		recursedeps(dep[j]);

-	print(k);

+	print(prepend k);

 }

 BEGIN {

@@ -113,7 +113,7 @@

 			echo "$file: No such file or directory" >&2

 			continue

 		fi

-		echo /lib/modules/$kernel/$file

+		echo $file

 	done | find_kmod_deps

 }