builder: Add libatomic1 package

Signed-off-by: Tam Mach <tam.mach@cilium.io>

Author: sayboras

Dockerfile

@@ -134,7 +134,7 @@ FROM docker.io/library/ubuntu:24.04@sha256:c35e29c9450151419d9448b0fd75374fec4ff
 LABEL maintainer="maintainer@cilium.io"
 # install ca-certificates package
 RUN apt-get update && apt-get upgrade -y \
-    && apt-get install --no-install-recommends -y ca-certificates \
+    && apt-get install --no-install-recommends -y ca-certificates libatomic1 \
     && apt-get autoremove -y && apt-get clean \
     && rm -rf /tmp/* /var/tmp/* \
     && rm -rf /var/lib/apt/lists/*

Dockerfile.builder

@@ -22,7 +22,7 @@ RUN apt-get update && \
       gcc-x86-64-linux-gnu g++-x86-64-linux-gnu libc6-dev-amd64-cross binutils-x86-64-linux-gnu \
       libc6-dev \
       # Envoy Build dependencies
-      autoconf automake cmake coreutils curl git libtool make ninja-build patch patchelf \
+      autoconf automake cmake coreutils curl git libtool make ninja-build patch patchelf libatomic1 \
 	python3 python-is-python3 unzip virtualenv wget zip \
       # Cilium-envoy build dependencies
       software-properties-common && \