linux: Ensure we have buildable kernel recipes for each machine
Fix various kernels to build with our toolchain, this includes well known fixes
for:
* sumversion.c: compilation failing with a 'PATH_MAX' undeclared (fixed by
adding limits.h to sumversions includes
* a patch taken from oe.dev to stop GCC >= 4.3 from optimizing a loop which
causes compilation to fail
* Fixing the KERNEL_OUTPUT for mx31 and nokia800 kernel recipes
