ltp: Update to 20180926

ltp: Update to 20180926

New patches
* 0001-statx-fix-compile-errors.patch

Rebased patches
* 0039-commands-ar01-Fix-for-test-in-deterministic-mode.patch

Removed removed (accepted in upstream)
* 0041-cve-2017-5669-shmat-for-0-or-PAGESIZE-with-RND-flag-.patch
* 0042-fs-ftest-ftest06.c-Fix-too-small-name-string-and-rel.patch
* 0043-open-creat-skip-S_ISGID-check-on-files-created-by-no.patch

Removed patches (different fix accepted in upstream)
* 0001-mmap15-mips64-return-EINVAL.patch

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>