updated rootfs_overlay for orangepi_pc

scripts/uclibc.sh

@@ -9,6 +9,7 @@ uclibc() {
     pkgname=uClibc-ng
     pkgver=${UCLIBC_VERSION}
     printf "$UGREEN** Building ${pkgname}\n$RESET"
+    [ -d $build/${pkgname} ] && return 0
     mkdir -p $build/${pkgname} # &>> $fulllogfile
     cd $build/${pkgname}
     tar -xvf $root/downloads/${pkgname}-${pkgver}.tar.xz # &>> $fulllogfile