ci: fix arch build

Dockerfile.arch

@@ -1,10 +1,9 @@
-FROM archlinux:latest
+FROM archlinux
 
 ENV TERM=xterm
 ENV CC="ccache gcc"
 
-RUN pacman -Syyu --noconfirm
-
+RUN pacman -Syu --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)
@@ -19,6 +18,7 @@ RUN pacman -S --needed --noconfirm \
   check \
   cmake \
   cmocka \
+  glibc \
   lcov \
   curl \
   debuginfod \