Some changes to use GekkoFS in powerpc
- Syscall intercept powerpc branch (dl_dep modified to allow commits in branches)
- powerpc define to avoid syscall_intercept_wrapper (as return codes work different compared to x86)
- Removed oerrno in hooks avoiding the correct behaviour of mpirun (errno was Success, it should be EEXIST)
- unlinkat syscall tests failed.
- intercept header in hooks.hpp , removed from external C, to allow syscall_no_intercept_wrapper template in powerpc