Add gexiv2 (#2594)

* Add gexiv2

* canonical source

packages/gexiv2.rb

+require 'package'
+
+class Gexiv2 < Package
+  description 'gexiv2 is a GObject wrapper around the Exiv2 photo metadata library.'
+  homepage 'https://wiki.gnome.org/Projects/gexiv2/'
+  version '0.10.8'
+  source_url 'https://download.gnome.org/sources/gexiv2/0.10/gexiv2-0.10.8.tar.xz'
+  source_sha256 '81c528fd1e5e03577acd80fb77798223945f043fd1d4e06920c71202eea90801'
+
+  depends_on 'libexiv2'
+  depends_on 'gobject_introspection'
+
+  def self.build
+    system "./configure --prefix=#{CREW_PREFIX} --libdir=#{CREW_LIB_PREFIX}"
+    system "make"
+  end
+
+  def self.check
+    system "make check"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end