Fix libxml dep name

Signed-off-by: Marc Poulhiès <dkm@kataplop.net>

Author: dkm

Dockerfile

@@ -15,7 +15,7 @@ RUN apt update -y -q && apt upgrade -y -q && apt upgrade -y -q && apt install -y
     git \
     gnat-11 \
     libc6-dev-i386 \
-    libxml-dev \
+    libxml2-dev \
     libelf-dev \
     linux-libc-dev \
     make \