util/docker/archlinux: Add more packages allowing CI builds

Following commands were used to test if everything builds:

    * make crossgcc
    * make clang
    * make what-jenkins-does

Change-Id: I757e6dbac557bcb640777b819529a978bf54ed93
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79314
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zebreus <lennarteichhorn@googlemail.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

util/docker/archlinux/Dockerfile

@@ -13,17 +13,23 @@ RUN pacman-key --init && \
 RUN pacman -S --noconfirm \
 	base-devel \
 	bash-completion \
+	bc \
 	bzip2 \
 	ccache \
+	cmake \
 	cscope \
+	dtc \
 	gcc-ada \
 	git \
 	go \
 	htop \
 	lcov \
 	less \
+	meson \
 	msitools \
 	neovim \
+	nss \
+	openssh \
 	openssl \
 	python3 \
 	shellcheck \