krb5 commit [krb5-1.18]: Fix compatibility with upcoming autoconf 2.70

https://github.com/krb5/krb5/commit/d220b2466c3c3d48a5bdcd8b4af0ba29e6c65498
commit d220b2466c3c3d48a5bdcd8b4af0ba29e6c65498
Author: Sergei Trofimovich <[email protected]>
Date:   Fri Nov 6 08:14:57 2020 +0000

    Fix compatibility with upcoming autoconf 2.70
    
    Mainline autoconf generates no shell code for AC_CONFIG_AUX_DIR().
    Call it unconditionally to avoid a syntax error.
    
    [[email protected]: rewrote commit message]
    
    (cherry picked from commit f78edbe30816f049e1360cb6e203fabfdf7b98df)
    
    ticket: 8960
    version_fixed: 1.18.3

 src/aclocal.m4 |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 2394f7e..8709a7f 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -13,11 +13,7 @@ fi
 ac_topdir=$srcdir/$ac_reltopdir
 ac_config_fragdir=$ac_reltopdir/config
 # echo "Looking for $srcdir/$ac_config_fragdir"
-if test -d "$srcdir/$ac_config_fragdir"; then
-  AC_CONFIG_AUX_DIR(K5_TOPDIR/config)
-else
-  AC_MSG_ERROR([can not find config/ directory in $ac_reltopdir])
-fi
+AC_CONFIG_AUX_DIR(K5_TOPDIR/config)
 ])dnl
 dnl
 dnl Version info.