Update from Gnulib
This incorporates: 2019-01-26 getloadavg: Add support for Android 2019-01-24 fchownat: Fix compilation error on Android 4.3 2019-01-24 mbtowc: Fix compilation error on Android 4.3 2019-01-24 random: Fix compilation error on Android 4.3 2019-01-24 renameat: Fix compilation error on Android 4.3 2019-01-24 unlinkat: Fix compilation error on Android 4.3 2019-01-19 gettext: support disabling use of VLAs 2019-01-17 sys_stat: Fix warning on OS/2 kLIBC 2019-01-17 fcntl: Fix syntax error (regression from 2018-10-05) 2019-01-10 verify: Enable _GL_HAVE_STATIC_ASSERT for recent G++ 2018-12-22 stdioext: port to newer 32-bit Android 2018-12-16 libc-config: Support HP-UX cc in C99 mode. * build-aux/config.guess, build-aux/config.sub, doc/misc/texinfo.tex: * lib/cdefs.h, lib/fcntl.c, lib/getloadavg.c, lib/gettext.h: * lib/regexec.c, lib/stdio-impl.h, lib/stdio.in.h, lib/stdlib.in.h: * lib/sys_stat.in.h, lib/unistd.in.h, lib/verify.h, m4/stdlib_h.m4: Copy from Gnulib. * lib/gnulib.mk.in: Regenerate.