ppp: fix PKG_MIRROR_HASH
Current PKG_MIRROR_HASH is wrong, but it went unnoticed, because the
tarball is being fetched from @OPENWRT project mirrors. Can be
reproduced with:
make package/ppp/{download,check} FIXUP=1 DL_DIR=/tmp PKG_MIRROR_HASH=''
Signed-off-by: Petr Štetiar <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20322
Signed-off-by: Robert Marko <[email protected]>