autoconf diff - Bitrig support

[David Hill]

Hello,

Here is a diff for the Bitrig OS, an OpenBSD fork.  config.guess and
config.sub have been updated upstream.

diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 97cb7b9..5987a0c 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -922,7 +922,7 @@ char *malloc ();
               [ac_cv_func_malloc_0_nonnull=no],
               [case "$host_os" in # ((
                  # Guess yes on platforms where we know the result.
-                 *-gnu* | freebsd* | netbsd* | openbsd* \
+                 *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
                  | hpux* | solaris* | cygwin* | mingw*)
                    ac_cv_func_malloc_0_nonnull=yes ;;
                  # If we don't know, assume the worst.
@@ -1441,7 +1441,7 @@ char *realloc ();
               [ac_cv_func_realloc_0_nonnull=no],
               [case "$host_os" in # ((
                  # Guess yes on platforms where we know the result.
-                 *-gnu* | freebsd* | netbsd* | openbsd* \
+                 *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
                  | hpux* | solaris* | cygwin* | mingw*)
                    ac_cv_func_realloc_0_nonnull=yes ;;
                  # If we don't know, assume the worst.