debian: add dependency on libgrx-3.0-X-plugin-linuxfb

On ev3dev, we need to make sure that the linuxfb plugin for libgrx-3.0
is installed, otherwise no graphics will be displayed.

Issue: ev3dev/ev3dev#1275

Author: dlech

debian/control

@@ -18,7 +18,8 @@ Vcs-Browser: https://github.com/ev3dev/ev3devKit
 Package: libev3devkit-0.5-0
 Section: libs
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}, ev3devkit-data (= ${source:Version})
+Depends: ${shlibs:Depends}, ${misc:Depends}, ev3devkit-data (= ${source:Version}),
+    libgrx-3.0-${grx-so-version}-plugin-linuxfb
 Description: Programming toolkit for ev3dev
  Provides a GLib/GObject based library that provides a number of programming
  interfaces for ev3dev, including user interface and device driver interface.

debian/rules

@@ -4,8 +4,13 @@
 # Uncomment this to turn on verbose mode.
 export DH_VERBOSE=1
 
+GRX_SO_VERSION = $(shell dpkg -s libgrx-3.0-dev  | grep -o -P 'libgrx-3.0-\d+\s' | cut -d "-" -f 3)
+
 %:
 	dh $@ --with gir
 
 override_dh_install:
 	dh_install --list-missing
+
+override_dh_gencontrol:
+	dh_gencontrol -- -Vgrx-so-version=$(GRX_SO_VERSION)