package/ebtables: bump to version 2.0.11

package/ebtables: bump to version 2.0.11

With the version bump to 2.0.11, ebtables switch to autotools build
system. In addition, ebtables-{restore/save} moved to being installed
as ebtables-legacy-{restore/save}.

Changes to support this version bump include:

 * Remove dependency on !BR2_STATIC_LIBS for ebtables-restore as the
   switch to autotools supports compiling with static libraries.
 * Update ebtables-save script patch to use /usr/sbin/ebtables-legacy
 * Remove 0001-*-ethernetdb*.patch as it was merged with commit:
     http://git.netfilter.org/ebtables/commit/?id=f8079671326e9fd079391d24911a9a8a77f1d6fd
 * Remove 0002-*-musl-*.patch as support was added with commit:
     http://git.netfilter.org/ebtables/commit/?id=9fff3d5f9da00255463d28b38d688c25025b7fb1

Tested with test-pkg with BR2_PACKAGE_EBTABLES=y:

                             br-arm-full [1/6]: OK
                  br-arm-cortex-a9-glibc [2/6]: OK
                   br-arm-cortex-m4-full [3/6]: SKIPPED
                          br-x86-64-musl [4/6]: OK
                      br-arm-full-static [5/6]: OK
                            sourcery-arm [6/6]: OK

Signed-off-by: Ryan Barnett <ryanbarnett3@gmail.com>
Tested-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>