bgpd: Fix bgp_btoa to compile

bgp_btoa was abandoned at some point in time in the past.
This commit gets it to compile and to be added to /usr/bin.

At this point in time no work has done for 'correctness' of execution

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/bgpd/Makefile.am b/bgpd/Makefile.am
index b2614f4..a35ad87 100644
--- a/bgpd/Makefile.am
+++ b/bgpd/Makefile.am
@@ -8,6 +8,7 @@
 
 noinst_LIBRARIES = libbgp.a
 sbin_PROGRAMS = bgpd
+bin_PROGRAMS = bgp_btoa
 
 libbgp_a_SOURCES = \
 	bgpd.c bgp_fsm.c bgp_aspath.c bgp_community.c bgp_attr.c \
@@ -26,6 +27,9 @@
 bgpd_SOURCES = bgp_main.c
 bgpd_LDADD = libbgp.a ../lib/libzebra.la @LIBCAP@ @LIBM@
 
+bgp_btoa_SOURCES = bgp_btoa.c
+bgp_btoa_LDADD = libbgp.a ../lib/libzebra.la @LIBCAP@ @LIBM@
+
 examplesdir = $(exampledir)
 dist_examples_DATA = bgpd.conf.sample bgpd.conf.sample2