[epiphany] Fix flag used for appdata validation

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ad9b2c6b5855f4fc4b60fdeca58446fc8103bb61
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Thu Nov 10 17:30:38 2016 -0600

    Fix flag used for appdata validation

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 35c04c0..8df1220 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = \
        LICENSE.prism
 
 AM_DISTCHECK_CONFIGURE_FLAGS = \
-       --enable-appdata-check  \
+       --enable-appstream-util \
        --enable-debug
 
 @CODE_COVERAGE_RULES@