Add a -dbg package to the debian build

debian/control

@@ -2,7 +2,7 @@ Source: flexnbd
 Section: unknown
 Priority: extra
 Maintainer: Alex Young <alex@bytemark.co.uk>
-Build-Depends: cdbs, debhelper (>= 7), ruby, rake, gcc
+Build-Depends: cdbs, debhelper (>= 7.0.50), ruby, rake, gcc
 Standards-Version: 3.8.1
 Homepage: http://bigv.io/
 
@@ -12,3 +12,14 @@ Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: FlexNBD server
   An NBD server offering push-mirroring and intelligent sparse file handling
 
+Package: flexnbd-dbg
+Architecture: any
+Section: debug
+Priority: extra
+Depends:
+    flexnbd (= ${binary:Version}),
+    ${misc:Depends}
+Description: debugging symbols for flexnbd
+ An NBD server offering push-mirroring and intelligent sparse file handling
+ .
+ This package contains the debugging symbols for flexnbd.

debian/rules

@@ -12,3 +12,7 @@ override_dh_auto_build:
 
 override_dh_auto_clean:
 	rake clean
+
+.PHONY: override_dh_strip
+override_dh_strip:
+	dh_strip --dbg-package=flexnbd-dbg