[build] bump soname to indicate new API call

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>

libknet/Makefile.am

@@ -18,7 +18,7 @@ EXTRA_DIST		= $(SYMFILE)
 SUBDIRS			= . tests
 
 # https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-libversion		= 3:0:2
+libversion		= 4:0:3
 
 # override global LIBS that pulls in lots of craft we don't need here
 LIBS			=