require minimum version 1.3.0 of libosmocore

Finally, a libosmocore version with per-thread select loop fd sets
has been released, so we can update our version requirement here.

Change-Id: Ic2654b18fd1f00aa4c1ab01892ecaa48ad2ba29f
Closes: OS#4250
diff --git a/configure.ac b/configure.ac
index d041c1a..31af887 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@
 AC_CHECK_LIB(csv, csv_init, LIBS="$LIBS -lcsv", [AC_MSG_ERROR([*** libcsv library not found!])])
 AC_CHECK_HEADERS([csv.h])
 
-PKG_CHECK_MODULES(OSMOCORE, libosmocore >= 0.11.0)
+PKG_CHECK_MODULES(OSMOCORE, libosmocore >= 1.3.0)
 PKG_CHECK_MODULES(OSMOGSM, libosmogsm >= 0.11.0)
 PKG_CHECK_MODULES(OSMOABIS, libosmoabis)
 PKG_CHECK_MODULES(OSMOSIM, libosmosim)