libosmocore: Introduce 0.5.3 and bump the META_TELEPHONY_OSMO_INC

META_TELEPHONY_OSMO_INC functions as kind of a reverse dependency,
packages using libosmocore will now rebuild and link to the newer
soversion of the libraries. Upgrade OpenBSC due an ABI change in
the GPRS/GB code.
diff --git a/recipes-osmocom/libosmocore/libosmocore_0.5.3.bb b/recipes-osmocom/libosmocore/libosmocore_0.5.3.bb
new file mode 100644
index 0000000..d7b84d8
--- /dev/null
+++ b/recipes-osmocom/libosmocore/libosmocore_0.5.3.bb
@@ -0,0 +1,11 @@
+require ${PN}.inc
+
+S = "${WORKDIR}/git"
+SRCREV = "335aedabf204ac025a79801c15c8488d35cc9981"
+SRC_URI = "git://git.osmocom.org/libosmocore.git;protocol=git"
+PR = "${INC_PR}.0"
+
+# because "${WORKDIR}/git" is not a git repo, it can't figure out the version
+do_configure_prepend() {
+    echo "${PV}" > ${S}/.tarball-version
+}