openbsc: update to current master for MNCC-AMR and TCH/H support

recipes-osmocom/openbsc/openbsc/upgrade-mncc-version.patch

@@ -0,0 +1,17 @@
+lcr uses MNCC_SOCK_VERSION 5, but this is binary compatible to
+what openbsc thinks is version 4.  The only difference is the added
+RTP related commands, which are optional.
+
+Index: openbsc/include/openbsc/mncc.h
+===================================================================
+--- openbsc.orig/include/openbsc/mncc.h
++++ openbsc/include/openbsc/mncc.h
+@@ -163,7 +163,7 @@ struct gsm_data_frame {
+ 	unsigned char	data[0];
+ };
+ 
+-#define MNCC_SOCK_VERSION	4
++#define MNCC_SOCK_VERSION	5
+ struct gsm_mncc_hello {
+ 	uint32_t	msg_type;
+ 	uint32_t	version;

recipes-osmocom/openbsc/openbsc_git.bb

@@ -3,8 +3,8 @@ require ${PN}.inc
 PV = "0.13.0+gitr${SRCPV}"
 PR = "${INC_PR}.4"
 
-SRCREV = "8a158bb1ea36d0f88da18d0f034884b30f09fda2"
+SRCREV = "a4c63b0cdba82a453875d9208d9dad0b9b530d56"
 SRC_URI += "git://git.osmocom.org/openbsc.git;protocol=git \
-    file://revert-mncc-version.patch"
+    file://upgrade-mncc-version.patch"
 
 S = "${WORKDIR}/git/openbsc"