debian: Split libosmocore into various libs and address lintian warnings

Package the various libraries separately. This will allow to install
libosmogsm3 and libosmogsm4 in parallel.

E: libosmocore-dev: non-empty-dependency_libs-in-la-file usr/lib/libosmocore.la
E: libosmocore-dev: non-empty-dependency_libs-in-la-file usr/lib/libosmogb.la
E: libosmocore-dev: non-empty-dependency_libs-in-la-file usr/lib/libosmogsm.la
E: libosmocore-dev: non-empty-dependency_libs-in-la-file usr/lib/libosmovty.la

W: libosmocore-dbg: wrong-bug-number-in-closes l54:#nnnn
W: libosmocore: wrong-bug-number-in-closes l54:#nnnn

W: libosmocore: package-name-doesnt-match-sonames libosmocodec0 libosmocore4 libosmogb2 libosmogsm4 libosmovty0
diff --git a/debian/changelog b/debian/changelog
index e3c7e89..9e8ff15 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
-libosmocore (0.6.3) UNRELEASED; urgency=low
+libosmocore (0.6.3+git1-1) UNRELEASED; urgency=low
 
   * New upstream release with new primitives, USSD fixes.
+  * Split libosmocore into several package. One lib per package.
 
  -- Holger Hans Peter Freyther <holger@freyther.de>  Fri, 09 Aug 2013 17:47:30 +0200
 
@@ -51,6 +52,6 @@
 
 libosmocore (0.1.17-1) unstable; urgency=low
 
-  * Initial release (Closes: #nnnn)  <nnnn is the bug number of your ITP>
+  * Initial release
 
  -- Harald Welte <laforge@gnumonks.org>  Tue, 24 Aug 2010 10:55:04 +0200