[Patches]
KEEP _unlinux.patch_: remove reference to build system paths
DISABLE _libtool.patch_: this patch adds a "--tag=CC" to be compatible with libtool2.2.4.
however with latest 2.2.10 libtool, w/o this patch it still works. From
the manual, CC is the default tag actually. So disable it for now, and once
same error happens again, it'll be re-neabled and if necessary push to upstream
DISABLE _workaround.patch_: a SIGUSR1 is hooked to signal suspend event as a so-called 'workaround'.
however no exact commit is found for exact usage case. So disable it.
REMOVE _debian.patch_: in upstream