[epiphany] Simplify make_release script

[Michael Catanzaro <mcatanzaro src gnome org>]

commit bcf9bb2f95e02f5c339b481fc3d29358c05802b9
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat May 20 10:26:38 2017 -0500

    Simplify make_release script

 make_release.sh |   12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/make_release.sh b/make_release.sh
index a860da0..18fcc6c 100755
--- a/make_release.sh
+++ b/make_release.sh
@@ -1,18 +1,10 @@
 #!/bin/sh
-test -n "$srcdir" || srcdir=$1
-test -n "$srcdir" || srcdir=.
-
-cd $srcdir
 
 VERSION=$(git describe --abbrev=0)
 NAME="epiphany-$VERSION"
 
 echo "Creating git tree archive…"
-git archive --prefix="${NAME}/" --format=tar HEAD > epiphany.tar
-
-rm -f "${NAME}.tar"
-tar -Af "${NAME}.tar" epiphany.tar
-rm -f epiphany.tar
+git archive --prefix="${NAME}/" --format=tar --output="${NAME}.tar" HEAD
 
 echo "Compressing archive…"
-xz -f "${NAME}.tar"
+xz --force --verbose "${NAME}.tar"