[epiphany] Generate ChangeLog in builddir

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2b75aa1c95c1d159d03013759f9e6d16d5d2215e
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Jul 9 13:32:02 2016 -0500

    Generate ChangeLog in builddir
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768218

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index fd62b69..43e1e1f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -17,7 +17,7 @@ distuninstallcheck_listfiles = find . -type f -print | grep -v 'icon-theme.cache
 ChangeLog:
        @if test -f $(top_srcdir)/.git/HEAD; then \
                pushd $(top_srcdir); \
-               git log --max-count=500 --no-decorate --stat > $@; \
+               git log --max-count=500 --no-decorate --stat > $(abs_top_builddir)/$@; \
                popd; \
        fi