jose: fix build with old compilers

This commit adds two patches to the jose package that fix the build
with old compilers such as gcc 4.7.

Fixes:

  http://autobuild.buildroot.net/results/00d5a4b809922f8fa42c0de9d461c9754d2f8098



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>