sys-assert: add option to disable sys-assert

sys-assert: add option to disable sys-assert

- Actions of sys-assert
  = sys-assert adds signal handlers for crash signals
    (SIGABRT, SIGSEGV, ...) by /etc/ld.so.preload
  = sys-asserts changes the path of coredump file
    for crash-worker to gather all of crash information

- This commit adds the option 'SYS_ASSERT_ENABLE' and
  sets the value to 'no'. Thus sys-assert is not preloaded,
  and the path of coredump is set (/var/lib/systemd/coredump)
  by systemd

Change-Id: Ia4423fd64380b99c3699216937c16595a77c70a0
Signed-off-by: Taeyoung Kim <ty317.kim@samsung.com>