Move jack_control to dbus (#831)

* Move jack_control to dbus dir

dbus/jack_control:
The `jack_control` script is dbus specific and not part of the original
jack tools. As the files offered by jack-example-tools are now
optionally not built, the script needs to be made available from a
location, that is not ignored when omitting the build of
jack-example-tools files.

* Move installation of jack_control to dbus integration

dbus/wscript:
Install `jack_control` script if building/installing jackdbus.

tools/wscript:
Remove (unconditional) installation of `jack_control` script.

dbus/wscript

@@ -89,3 +89,6 @@ def build(bld):
             target = 'org.jackaudio.service',
             install_path = '${DBUS_SERVICES_DIR}/',
             BINDIR = bld.env['PREFIX'] + '/bin')
+
+    if not bld.env['IS_WINDOWS']:
+        bld.install_files('${PREFIX}/bin', 'jack_control', chmod=0o755)

tools/wscript

@@ -114,4 +114,3 @@ def build(bld):
 
     if not bld.env['IS_WINDOWS']:
         bld.symlink_as('${PREFIX}/bin/jack_disconnect', 'jack_connect')
-        bld.install_files('${PREFIX}/bin', 'jack_control', chmod=0o755)