[sushi] Fix builddir != srcdir builds

[Emmanuele Bassi <ebassi src gnome org>]

commit 2e8e73f5bd9d5501ed6fa23a7320fea5fcff4858
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Jun 3 09:52:43 2016 +0100

    Fix builddir != srcdir builds
    
    The enumeration types header is located in the build directory.
    
    The likely reason why this was not caught is that `make distcheck` is
    usually ran after a `make all` in the srcdir, which places a generated
    header in the source directory.

 src/Makefile-sushi.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Makefile-sushi.am b/src/Makefile-sushi.am
index 7349932..d904485 100644
--- a/src/Makefile-sushi.am
+++ b/src/Makefile-sushi.am
@@ -109,4 +109,4 @@ Sushi_1_0_gir_INCLUDES = \
 Sushi_1_0_gir_FILES = \
     $(addprefix $(srcdir)/,$(sushi_source_h)) \
     $(addprefix $(srcdir)/,$(sushi_source_c)) \
-    $(srcdir)/sushi-enum-types.h
+    sushi-enum-types.h