SGA 0.9.35

Closes Homebrew/homebrew#15514.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/sga.rb

@@ -2,20 +2,29 @@ require 'formula'
 
 class Sga < Formula
   homepage 'https://github.com/jts/sga'
-  url 'https://github.com/jts/sga/tarball/v0.9.19'
-  sha1 '3f33b708ec930335045ab2a25de291a978f1b875'
+  url 'https://github.com/jts/sga/tarball/v0.9.35'
+  sha1 'e505f46fc6ba0e991096d7d9a9d50d37c94e4d4c'
 
   head 'https://github.com/jts/sga.git'
 
+  depends_on :autoconf => :build
+  depends_on :automake => :build
   # Only header files are used, so :build is appropriate
   depends_on 'google-sparsehash' => :build
   depends_on 'bamtools'
 
+  # Fix two compiler errors. Both fixed upstream.
+  def patches
+    ['http://github.com/jts/sga/commit/b4efb323ed.diff',
+     'https://github.com/jts/sga/commit/dfe74633fb.diff'] unless build.head?
+  end
+
   def install
-    chdir 'src' do
+    cd 'src' do
       system "./autogen.sh"
       system "./configure", "--disable-debug", "--disable-dependency-tracking",
-        "--prefix=#{prefix}", "--with-bamtools=/usr/local"
+                            "--prefix=#{prefix}",
+                            "--with-bamtools=#{HOMEBREW_PREFIX}"
       system "make install"
     end
   end