buildrepo: avoid using 'i' as loop variable

some apkbuilds use it in global context

buildrepo.in

@@ -20,7 +20,7 @@ fi
 usage() {
 	echo "usage: $program [-a APORTSDIR] [-d REPODIR] [-hp] [-l LOGPREFIX ]"
 	echo "                [-r DEPREPO] REPOSITORY..."
-	
+
 	echo "options:"
 	echo " -a  Set the aports base dir to APORTSDIR instead of $aportsdir"
 	echo " -d  Set destination repository base dir to REPODIR instead of $repodir"
@@ -87,10 +87,10 @@ list_needbuild() {
 	# first we try copy everything possible and find out which we need
 	# to rebuild. By doing this we might save us for rebuilding 
 	# needed when running 'abuild -R'
-	for i in */APKBUILD; do
-		[ -f "$aportsdir/$repo/$i" ] || continue
+	for apkbuild in */APKBUILD; do
+		[ -f "$aportsdir/$repo/$apkbuild" ] || continue
 		export REPODEST="$repodir"
-		cd "$aportsdir/$repo"/${i%/*} || return 1
+		cd "$aportsdir/$repo"/${apkbuild%/*} || return 1
 		pkgname=
 		pkgver=
 		pkgrel=
@@ -118,9 +118,9 @@ list_needbuild() {
 			echo ">>> Copying " $pkgs >&2
 			cp -p -l $pkgs "$repodir/$repo/$CARCH"/ 2>/dev/null \
 				|| cp -p $pkgs "$repodir/$repo/$CARCH"/ \
-				|| echo "$i"
+				|| echo "$apkbuild"
 		else
-			echo "$i"
+			echo "$apkbuild"
 		fi
 	done
 }