configure.ac: Package is now called osmo-bsc, not openbsc

Change-Id: I85511946316a34877080ac55553c5b88e34bd1be
diff --git a/configure.ac b/configure.ac
index a091b39..5d684ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script
-AC_INIT([openbsc],
+AC_INIT([osmo-bsc],
 	m4_esyscmd([./git-version-gen .tarball-version]),
 	[openbsc@lists.osmocom.org])