Add libepoxy dependencies for vhost-device-gpu

the vhost-device-gpu crate linked here
rust-vmm/vhost-device#668
contains rutabaga_gfx that requires epoxy library

Signed-off-by: Dorinda Bassey <dbassey@redhat.com>

build_container.sh

@@ -14,6 +14,7 @@ DEBIAN_FRONTEND="noninteractive" apt-get install --no-install-recommends -y \
     autoconf autoconf-archive automake libtool \
     libclang-dev iproute2 \
     libasound2 libasound2-dev \
+    libepoxy libepoxy-dev \
     debhelper-compat libdbus-1-dev libglib2.0-dev meson ninja-build dbus
 
 # cleanup