Add revision check, so pipeline can build new revisions

Dockerfile

@@ -2,7 +2,7 @@ FROM lsiobase/alpine:3.8
 
 # set version label
 ARG BUILD_DATE
-ARG VERSION
+ARG OSCAM_VERSION
 LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
 LABEL maintainer="saarg"
 
@@ -29,6 +29,9 @@ RUN \
 	pcsc-lite \
 	pcsc-lite-libs && \
  echo "**** compile oscam ****" && \
+ if [ -z ${OSCAM_VERSION+x} ]; then \
+	OSCAM_VERSION=$(svn info --show-item revision http://www.streamboard.tv/svn/oscam/trunk ); \
+ fi && \
  svn checkout http://www.streamboard.tv/svn/oscam/trunk /tmp/oscam-svn && \
  cd /tmp/oscam-svn && \
  ./config.sh \