debian/control: correct library dependency of osmo-mgw against libosmo-mgcp1

When the library version was bump, the dependency of osmo-mgw
was forgotten.

Change-Id: I3eeafa3c294d9ec71a72fb2833fe3b2bdef05a50
Fixes: e7d27aeae10b ("Tag/Release Version 1.2.0")
diff --git a/debian/control b/debian/control
index 11fa685..e96115f 100644
--- a/debian/control
+++ b/debian/control
@@ -16,7 +16,7 @@
 Package: osmo-mgw
 Architecture: any
 Multi-Arch: foreign
-Depends: libosmo-mgcp0, ${misc:Depends}, ${shlibs:Depends}
+Depends: libosmo-mgcp1, ${misc:Depends}, ${shlibs:Depends}
 Description: OsmoMGW: Osmocom's Media Gateway for 2G and 3G circuit-switched mobile networks
 
 Package: libosmo-mgcp1