sys-fs/mtools: Sync with Gentoo

It's from Gentoo commit 062535d304341465c486836ea76710afb006033e.

sdk_container/src/third_party/portage-stable/sys-fs/mtools/Manifest

@@ -1,3 +1,4 @@
 DIST mtools-4.0.46.tar.lz 391300 BLAKE2B 997e766b215aebefb23d57f357ea0b95db62a7e3b40712597c38aa11c0f9c47dc43b0b6a34bfa2b976ec8298ed221c5d7d81e9f16dbeb0a4812e3a6cbff16a16 SHA512 1af737cc4793a2e6afe14b5595f085f8aa29e58bf4d8ba89454c7b9a10041a0ebe06fd50b525332c38805c7a9b014fc4379ae1cc259da7626974c6b6a061e727
 DIST mtools-4.0.47.tar.lz 391656 BLAKE2B 52fdfdaaea09cf3809b0432237b1491be9c2869fe839e951f11178970ebbc82d9dc4bc6446015e50f44098171493c4d4d191d23c03a0b83819b1dd66934493f1 SHA512 7d3db137a121f5fa54b1b2565048a3be5ac197f25240da037c8200232a0282b1541eb220359e6759e96e77836d2babc0b5a9894c91c5ba7b87b9acc5d1458c81
 DIST mtools-4.0.48.tar.lz 396333 BLAKE2B 3305f79bb7c67040a2df3cccfb2e5e7fde721c8b21f0a1eec1f34a7733596cd6d80135b21595b0b0d8ca6a556d23e891880adcc5122e7c9e128561842df4ffcc SHA512 a352ac557341a594009c7adf44964bc3e4ac31d7fbcfe8a52d70c3b3a06ac134d176f52515d5a7d9aef0563c14967fd80385dc0b84a979abed1f221156ff22a0
+DIST mtools-4.0.49.tar.lz 397000 BLAKE2B 239909e2a296875dd0a875f48296ee94e5f7781755e4690694b9ea6fa243582018cffbecd1750401ab55defea0a42f345ea828a5cfc3264eeb9d46373913b24a SHA512 b357a23143783ed860ea8e434a9f1c6be71b39ac10e106388c2986367f82b3bda9858340b8de3b6025193ee18729783560dce7c3e3a3595fd3aa6048837df518

sdk_container/src/third_party/portage-stable/sys-fs/mtools/mtools-4.0.49.ebuild

@@ -0,0 +1,54 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit flag-o-matic unpacker
+
+DESCRIPTION="Utilities to access MS-DOS disks from Unix without mounting them"
+HOMEPAGE="https://www.gnu.org/software/mtools/ https://savannah.gnu.org/projects/mtools"
+SRC_URI="mirror://gnu/${PN}/${P}.tar.lz"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86 ~x64-macos ~x64-solaris"
+IUSE="gui"
+
+RDEPEND="
+	virtual/libiconv
+	gui? (
+		x11-libs/libICE
+		x11-libs/libXau
+		x11-libs/libSM
+		x11-libs/libX11
+		x11-libs/libXt
+	)
+"
+DEPEND="${RDEPEND}"
+BDEPEND="$(unpacker_src_uri_depends)"
+
+src_configure() {
+	if ! use elibc_glibc && ! use elibc_musl ; then
+		# bug #447688
+		append-libs "-liconv"
+	fi
+
+	local myeconfargs=(
+		--sysconfdir="${EPREFIX}"/etc/mtools
+		$(use_with gui x)
+	)
+
+	econf "${myeconfargs[@]}"
+}
+
+src_install() {
+	local -a DOCS=( README* Release.notes )
+
+	default
+
+	insinto /etc/mtools
+	doins mtools.conf
+
+	# Default is fine
+	sed -i -e '/^SAMPLE FILE$/s:^:#:' "${ED}"/etc/mtools/mtools.conf || die
+}