ci: fix arch build

Dockerfile.arch

@@ -1,12 +1,15 @@
-FROM archlinux
+FROM archlinux:latest
 
 ENV TERM=xterm
 ENV CC="ccache gcc"
 
-RUN pacman -Syu --noconfirm
+RUN pacman -Syyu --noconfirm || true
+RUN pacman -Syyu --noconfirm
+
 # reflector is optional - if it fails due to network issues, continue with default mirrorlist
 RUN pacman -S --needed --noconfirm reflector && \
-    (reflector --latest 20 --protocol https --sort rate --save /etc/pacman.d/mirrorlist || true)
+    (reflector --latest 20 --protocol https --save --sort rate /etc/pacman.d/mirrorlist || true)
+RUN export DEBUGINFOD_URLS="https://debuginfod.archlinux.org"
 RUN pacman-key --init
 RUN pacman -S --needed --noconfirm \
   autoconf \