package/libtirpc: bump version

Bump to version 0.3.1:
  - update our patches
  - rename patches for proper numbering
  - drop patch 0007, applied upstream

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>