LOGGING: configure logging from the vty

We can now configure logging to (multiple) files, stderr and syslog
from the vty command line in a persistent way (config file)
diff --git a/src/vty/Makefile.am b/src/vty/Makefile.am
index 7353ab8..8d730c3 100644
--- a/src/vty/Makefile.am
+++ b/src/vty/Makefile.am
@@ -10,5 +10,5 @@
 
 libosmovty_la_SOURCES = buffer.c command.c vty.c vector.c utils.c \
 			telnet_interface.c logging_vty.c
-libosmovty_la_LIBADD = $(top_builddir)/src/libosmocore.la
+libosmovty_la_LIBADD = -losmocore $(top_builddir)/src/libosmocore.la
 endif