contrib: add llhttp

Change-Id: I1e3bad7e99673cad2bd49121914c7d3f69c00a95

contrib/src/llhttp/SHA512SUMS

+563a97301cc07ef8d64ee52572faaa705de0daf1bb428651ada0f22ea0bf7cc617c31883734d8786599c0eff223edfe637739169ee31da5b10f49db8c3ca6ed7  llhttp-9.2.0.tar.gz

contrib/src/llhttp/rules.mak

+# -*- mode: makefile; -*-
+#
+#  Copyright (C) 2018-2024 Savoir-faire Linux Inc.
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+#
+LLHTTP_VERSION := 9.2.0
+LLHTTP_URL := https://github.com/nodejs/llhttp/archive/refs/tags/release/v$(LLHTTP_VERSION).tar.gz
+
+LLHTTP_CMAKECONF := \
+	-DBUILD_SHARED_LIBS=Off \
+	-DBUILD_STATIC_LIBS=On
+
+$(TARBALLS)/llhttp-$(LLHTTP_VERSION).tar.gz:
+	$(call download,$(LLHTTP_URL))
+
+llhttp: llhttp-$(LLHTTP_VERSION).tar.gz
+	$(UNPACK)
+	mv llhttp-release-v$(LLHTTP_VERSION) $@
+
+.llhttp: llhttp .sum-llhttp
+	cd $< && mkdir -p build && cd build && $(CMAKE) $(LLHTTP_CMAKECONF) ..
+	cd $</build && $(MAKE) && $(MAKE) install
+	touch $@
+
+.sum-llhttp: llhttp-$(LLHTTP_VERSION).tar.gz