package/ltp-testsuite: fix build with glibc 2.28 or uclibc-ng 1.0.30

package/ltp-testsuite: fix build with glibc 2.28 or uclibc-ng 1.0.30

LTP fails to build 20180926 with both glibc 2.28 and uclibc-ng 1.0.30,
due error in m4 macro check:

In file included from /home/rclinux/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/sys/stat.h:446:0,
                 from ../../../../include/tst_safe_macros.h:26,
                 from ../../../../include/tst_test.h:85,
                 from statx05.c:27:
/home/rclinux/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/bits/statx.h:87:5: note: expected 'struct statx * restrict' but argument is of type 'struct statx *'
 int statx (int __dirfd, const char *__restrict __path, int __flags,
     ^~~~~
<builtin>: recipe for target 'statx01' failed
make[5]: *** [statx01] Error 1
<builtin>: recipe for target 'statx05' failed
make[5]: *** [statx05] Error 1

This patch requires to regenerate configure.

Fixes:
http://autobuild.buildroot.net/results/69566d0c728970a6dd6a793b08c5804df3cc00eb
http://autobuild.buildroot.net/results/3c53ddfaca70b490a401c9123602965f3803cd0a
http://autobuild.buildroot.net/results/8fb63f627a4ba55afea49ad0566064d20021889a
http://autobuild.buildroot.net/results/496a1b40d378eaca98e532c03afb47e5291427b3
http://autobuild.buildroot.net/results/47abceeda8044029b6d3200f3877d4d2c494202c

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Reported-by: Florian La Roche <F.LaRoche@pilz.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>