Create gegl.rb (#2586)

packages/gegl.rb

+require 'package'
+
+class Gegl < Package
+  description 'GEGL (Generic Graphics Library) is a data flow based image processing framework, providing floating point processing and non-destructive image processing capabilities to GNU Image Manipulation Program and other projects.'
+  homepage 'http://gegl.org/'
+  version '0.4.8'
+  source_url 'https://download.gimp.org/pub/gegl/0.4/gegl-0.4.8.tar.bz2'
+  source_sha256 '719468eec56ac5b191626a0cb6238f3abe9117e80594890c246acdc89183ae49'
+
+  depends_on 'babl'
+  depends_on 'json_glib'
+  depends_on 'libjpeg_turbo'
+
+  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