Create freetype_sub.rb (#2080)

* Create freetype_sub.rb

To handle circular dependency between harfbuzz and freetype

* Update freetype_sub.rb

packages/freetype_sub.rb

+require 'package'
+
+class Freetype_sub < Package
+  description 'Freetype_sub is a version without harfbuzz. It is intended to handle circular dependency betwwen freetype and harfbuzz.'
+  homepage 'https://www.freetype.org/'
+  version '2.9'
+  source_url 'http://download.savannah.gnu.org/releases/freetype/freetype-2.9.tar.gz'
+  source_sha256 'bf380e4d7c4f3b5b1c1a7b2bf3abb967bda5e9ab480d0df656e0e08c5019c5e6'
+
+
+  depends_on 'expat'
+  depends_on 'libpng'   # freetype needs zlib optionally. zlib is also the dependency of libpng
+  depends_on 'bz2'
+  
+  def self.build
+    system "./configure \
+            CFLAGS=\" -fPIC\" \
+            --prefix=#{CREW_PREFIX} \
+            --libdir=#{CREW_LIB_PREFIX} \
+            --without-harfbuzz"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+  
+  def self.postinstall
+    system "find #{CREW_BREW_DIR}/* -name freetype*.tar |xargs rm -rf"  # make sure to delete downloaded files
+  end
+  
+end