Update gc from 7.6.0 to 7.6.4

Add pre-built binaries

packages/gc.rb

@@ -3,33 +3,35 @@ require 'package'
 class Gc < Package
   description 'A garbage collector for C and C++.'
   homepage 'http://www.hboehm.info/gc/'
-  version '7.6.0'
-  source_url 'http://www.hboehm.info/gc/gc_source/gc-7.6.0.tar.gz'
-  source_sha256 'a14a28b1129be90e55cd6f71127ffc5594e1091d5d54131528c24cd0c03b7d90'
+  version '7.6.4'
+  source_url 'http://www.hboehm.info/gc/gc_source/gc-7.6.4.tar.gz'
+  source_sha256 'b94c1f2535f98354811ee644dccab6e84a0cf73e477ca03fb5a3758fb1fecd1c'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.0-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.0-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.0-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.0-chromeos-x86_64.tar.xz',
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.4-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.4-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.4-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/gc-7.6.4-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: 'd962f0e9693e93b7915865e592a6af653afc311117e64164550d0e6de459cacf',
-     armv7l: 'd962f0e9693e93b7915865e592a6af653afc311117e64164550d0e6de459cacf',
-       i686: '7419f6b39d300976cfb8d40692b7e446b4bd354198a8b6dfb8fd98e88255bb66',
-     x86_64: 'f7a3d7f2d3471f2e26fd5df087cd85f99ee959aebd81c47ebc14bb5f10a0a3df',
+    aarch64: '7bccf42832063675f479ab454166774462a256beb33ef4afd305a8d8187f4247',
+     armv7l: '7bccf42832063675f479ab454166774462a256beb33ef4afd305a8d8187f4247',
+       i686: '4c10f74d94175734e88e97397d73651c2e65e097b340c019e30808b09e0415b7',
+     x86_64: '92e09087a398ea9f03af37b8f1d9cf1d49b11573ed19e623bb8605636c94c81d',
   })
 
   depends_on 'libatomic_ops'
-  depends_on 'libtool'
 
   def self.build
-    system './configure'
+    system './configure',
+           "--prefix=#{CREW_PREFIX}",
+           "--libdir=#{CREW_LIB_PREFIX}",
+           '--disable-maintainer-mode',
+           '--enable-cplusplus'
     system 'make'
   end
 
   def self.install
     system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
-    system "libtool --finish /usr/local/lib"
   end
 end