build-unit-test-docker: add glib-2.0 for skeleton

openbmc/skeleton current needs glib-2.0 to build.  Add
it to the docker config.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I63ab9cdd4c84128fb878c6276213981660cd24bd
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 56dd211..f51af2a 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -831,6 +831,7 @@
     g++-13 \
     gcc-13 \
     git \
+    glib-2.0 \
     gnupg \
     iproute2 \
     iputils-ping \