debian: Fix libosmoabis soname package version

LIBVERSION for libosmoabis was increased during v0.4.0 release, but
didn't update the debian package name accordingly to match major.

Change-Id: I7ead154d72e6dadf795414c47fe276edadd08580
Fixes: OS#3365
diff --git a/debian/control b/debian/control
index 10295e6..9a4b27d 100644
--- a/debian/control
+++ b/debian/control
@@ -21,13 +21,13 @@
 Package: libosmo-abis
 Section: oldlibs
 Architecture: any
-Depends: libosmoabis5 (= ${binary:Version}), libosmotrau2 (= ${binary:Version}), ${misc:Depends}
+Depends: libosmoabis6 (= ${binary:Version}), libosmotrau2 (= ${binary:Version}), ${misc:Depends}
 Multi-Arch: same
 Description: Legacy package for libosmo-abis
  libosmo-abis is an empty package helping in the transition to one
  package per DSO.
 
-Package: libosmoabis5
+Package: libosmoabis6
 Section: libs
 Architecture: any
 Multi-Arch: same
@@ -59,7 +59,7 @@
 Section: libdevel
 Depends: ${misc:Depends},
          libosmotrau2 (= ${binary:Version}),
-         libosmoabis5 (= ${binary:Version})
+         libosmoabis6 (= ${binary:Version})
 Description: Development headers for A-bis interface
  The libosmo-abis library contains common/shared code regarding the A-bis
  interface between GSM BTS and BSC. This package in particular contains the
@@ -71,7 +71,7 @@
 Multi-Arch: same
 Section: debug
 Priority: extra
-Depends: libosmoabis5 (= ${binary:Version}),
+Depends: libosmoabis6 (= ${binary:Version}),
          libosmotrau2 (= ${binary:Version}),
          ${misc:Depends}
 Description: Debug symbols for A-bis interface