[dasher] Revert unintended part of last commit.

[Patrick Welche <pwelche src gnome org>]

commit 2a5329b0ec6d98f710fd00cbad0015248469e809
Author: Patrick Welche <prlw1 cam ac uk>
Date:   Thu Sep 1 17:35:01 2016 +0100

    Revert unintended part of last commit.
    
    I also forgot to thank Piotr Drąg for checking translations seemed
    to still work.

 Src/Gtk2/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Src/Gtk2/Makefile.am b/Src/Gtk2/Makefile.am
index 195d3af..8b94913 100644
--- a/Src/Gtk2/Makefile.am
+++ b/Src/Gtk2/Makefile.am
@@ -1,7 +1,7 @@
 noinst_LTLIBRARIES = libdashergtk.la libdashercontrol.la
 
 noinst_PROGRAMS = generate-schema
-generate_schema_SOURCES = GenerateSchema.cpp $(top_srcdir)/Src/DasherCore/Parameters.cpp
+generate_schema_SOURCES = GenerateSchema.cpp ../DasherCore/Parameters.cpp
 
 #bin_PROGRAMS = dasher-config