Add libosmocore.map

Generated with:
nm src/core/.libs/libosmocore.so --defined-only  |grep " T \| D \| B " | cut -c 20-  >> src/core/libosmocore.map

Change-Id: I13169c00a59fb59513dfc598de5a71d094492422
diff --git a/configure.ac b/configure.ac
index ecff654..108c0a1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,6 +55,7 @@
 	LTLDFLAGS_OSMOGSM='-Wl,--version-script=$(srcdir)/libosmogsm.map'
 	LTLDFLAGS_OSMOISDN='-Wl,--version-script=$(srcdir)/libosmoisdn.map'
 	LTLDFLAGS_OSMOCODING='-Wl,--version-script=$(srcdir)/libosmocoding.map'
+	LTLDFLAGS_OSMOCORE='-Wl,--version-script=$(srcdir)/libosmocore.map'
 	LTLDFLAGS_OSMOCTRL='-Wl,--version-script=$(srcdir)/libosmoctrl.map'
 	;;
 esac
@@ -62,6 +63,7 @@
 AC_SUBST(LTLDFLAGS_OSMOGSM)
 AC_SUBST(LTLDFLAGS_OSMOISDN)
 AC_SUBST(LTLDFLAGS_OSMOCODING)
+AC_SUBST(LTLDFLAGS_OSMOCORE)
 AC_SUBST(LTLDFLAGS_OSMOCTRL)
 
 dnl checks for header files