build: check for gmtime_r and localtime_r with the new macro.

This makes sure that the two functions are found when building on mingw32,
as the functions are defined as static inline rather than as library
symbols.
Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

configure.ac

@@ -556,7 +556,7 @@ need_libc=false
 dnl Check for usual libc functions
 AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
 AC_CHECK_FUNCS([daemon fcntl fstatvfs fork getenv getpwuid_r isatty lstat memalign mmap open_memstream openat pread posix_fadvise posix_madvise setlocale stricmp strnicmp strptime uselocale pthread_cond_timedwait_monotonic_np pthread_condattr_setclock])
-AC_REPLACE_FUNCS([atof atoll dirfd fdopendir flockfile fsync getdelim getpid gmtime_r lldiv localtime_r nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strsep strtof strtok_r strtoll swab tdestroy strverscmp])
+AC_REPLACE_FUNCS([atof atoll dirfd fdopendir flockfile fsync getdelim getpid lldiv nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strsep strtof strtok_r strtoll swab tdestroy strverscmp])
 AC_CHECK_FUNCS(fdatasync,,
   [AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
 ])
@@ -564,6 +564,8 @@ AC_CHECK_FUNCS(fdatasync,,
 dnl mingw64 implements those as static inline, not functions with C linkage
 VLC_REPLACE_DECL([asprintf], [#include <stdio.h>])
 VLC_REPLACE_DECL([vasprintf], [#include <stdio.h>])
+VLC_REPLACE_DECL([gmtime_r], [#include <time.h>])
+VLC_REPLACE_DECL([localtime_r], [#include <time.h>])
 
 dnl C11 static_assert()
 AC_MSG_CHECKING([for static_assert in assert.h])