[Fix Pattern] sgx-lkl process state not updated in /proc/[pid]/state

[hukoyu]

In sgx-lkl, process state is not properly updated in /proc/[pid]/state (proc file system). Some LTP tests rely on this info and this is not available in sgx-lkl. Tests were waiting indefinitely, instead sleep used to sleep a bit and to return as workaround.

LTP tests fixed with this pattern: (Count: 4)

futex_wait03
futex_wake02, futex_wake03, futex_wake04