set up osmocom recipes to current git master

This is for the upcoming 201705 release.
diff --git a/recipes-osmocom/libosmo-sccp/libosmo-sccp_git.bb b/recipes-osmocom/libosmo-sccp/libosmo-sccp_git.bb
new file mode 100644
index 0000000..60c5b54
--- /dev/null
+++ b/recipes-osmocom/libosmo-sccp/libosmo-sccp_git.bb
@@ -0,0 +1,11 @@
+require ${PN}.inc
+
+S = "${WORKDIR}/git"
+SRCREV = "882f340b6c394f581f6c32cafefa10c7b57073b9"
+SRC_URI = "git://git.osmocom.org/libosmo-sccp.git;protocol=git"
+PR = "${INC_PR}.1"
+
+# because "${WORKDIR}/git" is not a git repo, it can't figure out the version
+do_configure_prepend() {
+    echo "${PV}" > ${S}/.tarball-version
+}