Update the base system of Arch Linux images

The official Arch Linux DockerHub webpage recommends to always run a full system update in Arch Linux containers (see https://hub.docker.com/_/archlinux).

arch-self-contained/Dockerfile

 FROM archlinux:base
+LABEL maintainer="Ingo Meyer <i.meyer@fz-juelich.de>"
 
-RUN pacman -Syu --noconfirm git cmake make grep awk patch gcc pkgconf automake autoconf mesa xorg-xrandr libxinerama libxcursor qt5-base nasm
+RUN pacman -Syu --noconfirm && \
+    pacman -Sy --noconfirm --needed \
+        autoconf \
+        automake \
+        awk \
+        cmake \
+        gcc \
+        git \
+        grep \
+        libxcursor \
+        libxinerama \
+        make \
+        mesa \
+        nasm \
+        patch \
+        pkgconf \
+        qt5-base \
+        xorg-xrandr && \
+    yes | pacman -Scc