extras: tools: bump to automake 1.18

Release note:
https://lists.gnu.org/archive/html/automake/2025-05/msg00012.html

Notable references:

  - New option --stderr-prefix for tap-driver.sh, to prefix each line of
    stderr from a test script with a given string. (bug#72536)

extras/tools/SHA512SUMS

@@ -1,6 +1,6 @@
 3954a6ad3f522c135f327ba0d376eb16ae42103849c8cc5cd6c8c6e87b8c5433c95a0f2d4dfa3e6c2705ee0b8996e5b27d0b2248f64a05fc8c902116cc45a7b2  apache-ant-1.9.7.tar.bz2
 3f71d459e2127ef2c98b37f11f5284f0c92318ad8d31c5b6034bed370adfe9f3d0f7a12f87e2efced06c11e2a159de4d4a292b751104e83daf11342f25ba9721  autoconf-2.72.tar.gz
-11357dfab8cbf4b5d94d9d06e475732ca01df82bef1284888a34bd558afc37b1a239bed1b5eb18a9dbcc326344fb7b1b301f77bb8385131eb8e1e118b677883a  automake-1.17.tar.gz
+b558cf2635e40efde888d16b287a107049f8be091b3977aa138bcb3066b6f31901c77b75a25c4a87258047919c958adabe74d12458aab94acf1867ea82e2ff82  automake-1.18.tar.gz
 cf0096065b273f42bcae2bb628d4a475891e9e9a8cc9a01dabaa64d3b36dd78b4217a61c5ae86f7d8a81a12b5a4b37c09ae5ae31049d722601590aa65a395d5a  cmake-3.29.5.tar.gz
 f5dd0f02fcae65a176a16af9a8e1747c26e9440c6c224003ba458d3298b777a75ffb189aee9051fb0c4840b2a48278be4a51d959381af0b1d627570f478c58f2  m4-1.4.19.tar.gz
 56a9656539448972bc3080357ccc987bd4cbca3847758fe41251eb8af1a5e403a75f38d1344fa2c0bd56de880f37f3eaafbe7116c506f33331e7a8dd8a53cf2a  pkg-config-0.28-1.tar.gz

extras/tools/packages.mak

@@ -16,7 +16,7 @@ LIBTOOL_URL=$(GNU)/libtool/libtool-$(LIBTOOL_VERSION).tar.gz
 AUTOCONF_VERSION=2.72
 AUTOCONF_URL=$(GNU)/autoconf/autoconf-$(AUTOCONF_VERSION).tar.gz
 
-AUTOMAKE_VERSION=1.17
+AUTOMAKE_VERSION=1.18
 AUTOMAKE_URL=$(GNU)/automake/automake-$(AUTOMAKE_VERSION).tar.gz
 
 M4_VERSION=1.4.19