ltp: Add missing dependencies on coreutils, bc, e2fsprogs and gdb

When the tests are run we see messages like:

/opt/ltp/testcases/bin/run_cpuctl_stress_test.sh: line 242: nice: command not found
/opt/ltp/testcases/bin/run_cpuctl_test_fj.sh: line 66: tac: command not found
vma05 1 TCONF: 'gdb' not found
memcg_failcnt 1 TCONF: 'bc' not found
Owner=nobody; perms=-rw-------; sudo: lsattr: command not found

so add missing dependencies to avoid these.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>