Update nspr to 4.8.4

Formula/nspr.rb

@@ -1,18 +1,19 @@
 require 'formula'
 
 class Nspr <Formula
-  url 'http://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v4.7.6/src/nspr-4.7.6.tar.gz'
+  url 'http://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v4.8.4/src/nspr-4.8.4.tar.gz'
   homepage 'http://www.mozilla.org/projects/nspr/'
-  md5 'c78384602b4b466081a55025446641db'
+  md5 'a85bdbe1eb646aa32c785a37d8e3a2f5'
 
   def install
-    require 'hardware'
-
     ENV.deparallelize
     Dir.chdir "mozilla/nsprpub" do
+      # Fixes a bug with linking against CoreFoundation.
+      # See: http://openradar.appspot.com/7209349
+      # Needed to work with SpiderMonkey
       inreplace "pr/src/Makefile.in", "-framework CoreServices -framework CoreFoundation", ""
 
-      conf = %W[--prefix=#{prefix} --disable-debug --enable-strip --enable-optimize]
+      conf = ["--prefix=#{prefix}", "--disable-debug", "--enable-strip", "--enable-optimize"]
       conf << "--enable-64bit" if Hardware.is_64_bit? and MACOS_VERSION >= 10.6
       system "./configure", *conf