[gnome-builder] library-template: Add $(NULL) terminator to Makefile.am lists

[Philip Withnall <pwithnall src gnome org>]

commit 3e9c1c4a39a72db76c6ba1e26ed3c82e3a5b9cdd
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Sun Jan 31 11:21:42 2016 +0100

    library-template: Add $(NULL) terminator to Makefile.am lists
    
    This makes it easier to add new list entries without causing noise in
    the diff by fiddling with backslashes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761356

 .../shared-library/src/Makefile.am                 |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plugins/library-template/library_template/shared-library/src/Makefile.am 
b/plugins/library-template/library_template/shared-library/src/Makefile.am
index 7d5fa6a..39d61b2 100644
--- a/plugins/library-template/library_template/shared-library/src/Makefile.am
+++ b/plugins/library-template/library_template/shared-library/src/Makefile.am
@@ -2,7 +2,8 @@ lib_LTLIBRARIES = lib{{name}}-1.0.la
 
 lib{{name_}}_1_0_la_SOURCES = \
        {{prefix}}-version.h \
-       {{name}}.h
+       {{name}}.h \
+       $(NULL)
 
 lib{{name_}}_1_0_la_CFLAGS = $\{{{NAME}}_CFLAGS}
 lib{{name_}}_1_0_la_LIBADD = $\{{{NAME}}_LIBS}