git: update ignores

I don't understand what happened in
10acc148bb.

m4/.gitignore

@@ -43,14 +43,23 @@
 /getopt.m4
 /getprogname.m4
 /getrusage.m4
+/gettext.m4
 /gettime.m4
 /gettimeofday.m4
+/glibc2.m4
+/glibc21.m4
 /gnulib-cache.m4
 /gnulib-common.m4
 /gnulib-comp.m4
 /gnulib-tool.m4
 /host-cpu-c-abi.m4
+/iconv.m4
 /include_next.m4
+/intdiv0.m4
+/intl.m4
+/intldir.m4
+/intlmacosx.m4
+/intmax.m4
 /intmax_t.m4
 /inttypes-pri.m4
 /inttypes.m4
@@ -65,6 +74,7 @@
 /jm-winsz1.m4
 /jm-winsz2.m4
 /largefile.m4
+/lcmessage.m4
 /ldexp.m4
 /ldexpl.m4
 /lib-ld.m4
@@ -98,6 +108,7 @@
 /msvc-inval.m4
 /msvc-nothrow.m4
 /multiarch.m4
+/nls.m4
 /nocrash.m4
 /non-recursive-gnulib-prefix-hack.m4
 /obstack-printf.m4
@@ -109,11 +120,14 @@
 /pathmax.m4
 /perror.m4
 /pipe2.m4
+/po.m4
 /posix_spawn.m4
 /printf-frexp.m4
 /printf-frexpl.m4
 /printf-posix-rpl.m4
+/printf-posix.m4
 /printf.m4
+/progtest.m4
 /pthread_rwlock_rdlock.m4
 /quote.m4
 /quotearg.m4
@@ -169,12 +183,14 @@
 /time_h.m4
 /timespec.m4
 /tls.m4
+/uintmax_t.m4
 /unistd-safer.m4
 /unistd_h.m4
 /unlink.m4
 /unlocked-io.m4
 /vasnprintf.m4
 /vfprintf-posix.m4
+/visibility.m4
 /vsnprintf-posix.m4
 /vsnprintf.m4
 /vsprintf-posix.m4