openpower-build-setup: Add vim-common for xxd

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower-build-setup.sh b/openpower-build-setup.sh
index 4251871..1c771aa 100755
--- a/openpower-build-setup.sh
+++ b/openpower-build-setup.sh
@@ -46,7 +46,8 @@
 	apt-get install -y \
 	cscope ctags libz-dev libexpat-dev python language-pack-en texinfo \
 	build-essential g++ git bison flex unzip libxml-simple-perl \
-	libxml-sax-perl libxml2-dev libxml2-utils xsltproc wget cpio bc
+	libxml-sax-perl libxml2-dev libxml2-utils xsltproc wget cpio bc \
+	vim-common
 RUN groupadd -g ${GROUPS} ${USER} && useradd -d ${HOME} -m -u ${UID} -g ${GROUPS} ${USER}
 
 USER ${USER}