ltp: re-enable ftruncate04

ftruncate04 will exit with TCONF if CONFIG_MANDATORY_FILE_LOCKING is not
satisfied.  When it does apply, it passes.

Bug: 198611142
Test: atest -a vts_ltp_test_x86_64:syscalls.ftruncate04_64bit
Change-Id: Ifa0dffee2243bd3b0ba7e1c021a1aa54bc2965e6
Signed-off-by: Edward Liaw <edliaw@google.com>
2 files changed