gh-37212: Fix names of Gentoo packages
    
Gentoo renamed some build tools in late 2023. We update the names here
to fix the broken CI runs for Gentoo (that happen e.g. for cypari2.)

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of Gentoo CI in our setup that fails without this.)
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URL: #37212
Reported by: Julian Rüth
Reviewer(s): Dima Pasechnik, Frédéric Chapoton

Author: Release Manager

build/pkgs/_bootstrap/distros/gentoo.txt

@@ -1,3 +1,3 @@
-sys-devel/autoconf
-sys-devel/automake
-sys-devel/libtool
+dev-build/autoconf
+dev-build/automake
+dev-build/libtool

build/pkgs/_prereq/distros/gentoo.txt

@@ -9,7 +9,7 @@
 #
 sys-devel/binutils
 sys-libs/binutils-libs
-sys-devel/make
+dev-build/make
 dev-scheme/guile
 dev-libs/libffi
 app-arch/tar

build/pkgs/cmake/distros/gentoo.txt

@@ -1 +1 @@
-dev-util/cmake
+dev-build/cmake

build/pkgs/meson/distros/gentoo.txt

@@ -1 +1 @@
-dev-util/meson
+dev-build/meson

build/pkgs/ninja_build/distros/gentoo.txt

@@ -1 +1 @@
-dev-util/ninja
+dev-build/ninja