package/libplatform: bump version to 2.1.0

package/libplatform: bump version to 2.1.0

Rebased patch 0001.

Updated license info after
https://github.com/Pulse-Eight/platform/commit/a1e5905874d5cdbce110344558d21a2810dead9c

Fixes:
    http://autobuild.buildroot.org/results/052/052b29efb3e5b208003ea40aa6499297bbbb7ad4/
    http://autobuild.buildroot.org/results/0d4/0d4d7fefc86269e825c6cc842077daccf9b4f7ee/
    http://autobuild.buildroot.org/results/700/7003798bbb8dbed72d651863149490221583057b/
    ...

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>