libctrl: autotools build system integration

Now we actually build the recently-imported libctrl
diff --git a/configure.ac b/configure.ac
index eaaab50..deaa8bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,12 +186,14 @@
 	libosmovty.pc
 	libosmogsm.pc
 	libosmogb.pc
+	libosmoctrl.pc
 	include/Makefile
 	src/Makefile
 	src/vty/Makefile
 	src/codec/Makefile
 	src/gsm/Makefile
 	src/gb/Makefile
+	src/ctrl/Makefile
 	tests/Makefile
 	utils/Makefile
 	Doxyfile.core