dev-libs/libtasn1: Sync with Gentoo

It's from Gentoo commit 4ba6d3c31e981be734c49c185fa856766b1c0436.

sdk_container/src/third_party/portage-stable/dev-libs/libtasn1/Manifest

@@ -1,2 +1,4 @@
 DIST libtasn1-4.19.0.tar.gz 1786576 BLAKE2B 6e8232590cd87da3bfd9182ed44eccdfbdfcc85e88d8cf19fffdb3d600e04694b77079b95bbd822d2c3fff29458ddae0f0440f9c1c19c711923a2507bd19270f SHA512 287f5eddfb5e21762d9f14d11997e56b953b980b2b03a97ed4cd6d37909bda1ed7d2cdff9da5d270a21d863ab7e54be6b85c05f1075ac5d8f0198997cf335ef4
 DIST libtasn1-4.19.0.tar.gz.sig 228 BLAKE2B f45b8c53844fad4d1044ef6915d88337affb0287973a0ffab2d77a6a61c850cebdea6904f077fcc13a8bc29ba7cbbef7cdf2a5e325c8180d574020eb3cb9f432 SHA512 e0417625f8df22c6421914bf2d4f19d7f27260c24c04f50e59669681f326debe06ddef9dc5a2e20fda50feb30bbbf3f41597e64961257304ec2c407aa76d107e
+DIST libtasn1-4.20.0.tar.gz 1783873 BLAKE2B 3219b48e691abd7f6f4e32164ab708bc7c29832a2a7669aa03751d4a519dffb78d5a5f94530a3f35cd6516b39400da9e634d7f46245ab934465c305a1d387561 SHA512 0c0660085f5e80537aa3d65197967029be6cc5e27d7029789713902989c1694fdb49421ae0415b79b953e11893bb4bdaada85f7aff847dd0bb4075c91887e7b4
+DIST libtasn1-4.20.0.tar.gz.sig 1223 BLAKE2B c9bff7ae5b7f4939e4df1c0d67b634a1fde57554a5dae26a20fbe600dd9d5b79239a04d1531acdf1f6dedf2eb06bc2bab46c432dbe6c9ad991d0e06b41dcf268 SHA512 bb5da128c20ed8f1e7c681c779ac3d2e455c661d779a4a7a70a6cabc1ea4139df9d0acfd145545acc8fe41df6490fd7d3c2df4b8d7560891291abbf56ac3afdb

sdk_container/src/third_party/portage-stable/dev-libs/libtasn1/libtasn1-4.20.0.ebuild

@@ -0,0 +1,54 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/libtasn1.asc
+inherit multilib-minimal libtool verify-sig
+
+DESCRIPTION="ASN.1 library"
+HOMEPAGE="https://www.gnu.org/software/libtasn1/"
+SRC_URI="mirror://gnu/${PN}/${P}.tar.gz"
+SRC_URI+=" verify-sig? ( mirror://gnu/${PN}/${P}.tar.gz.sig )"
+
+LICENSE="LGPL-2.1+"
+SLOT="0/6" # subslot = libtasn1 soname version
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="static-libs test"
+
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	sys-apps/help2man
+	app-alternatives/yacc
+	verify-sig? ( >=sec-keys/openpgp-keys-libtasn1-20250209 )
+"
+
+DOCS=( AUTHORS ChangeLog NEWS README.md THANKS )
+
+src_prepare() {
+	default
+
+	# For Solaris shared library
+	elibtoolize
+}
+
+multilib_src_configure() {
+	# -fanalyzer substantially slows down the build and isn't useful for
+	# us. It's useful for upstream as it's static analysis, but it's not
+	# useful when just getting something built.
+	export gl_cv_warn_c__fanalyzer=no
+
+	local myeconfargs=(
+		--disable-valgrind-tests
+		$(use_enable static-libs static)
+	)
+
+	ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	find "${ED}" -type f -name '*.la' -delete || die
+}