Let autoconf figure out the host

Author: ianks

build/patches2/rake-compiler-1.1.6/0004-Enable-build-of-static-libruby.patch

@@ -1,9 +1,12 @@
-diff --git a/tasks/bin/cross-ruby.rake b/tasks/bin/cross-ruby.rake
-index 8317a2a..5a1b3ea 100644
---- a/tasks/bin/cross-ruby.rake
-+++ b/tasks/bin/cross-ruby.rake
-@@ -116,10 +116,22 @@ RUBY_CC_VERSIONS.split(":").each do |ruby_cc_version|
-         "--host=#{mingw_host}",
+diff --git i/tasks/bin/cross-ruby.rake w/tasks/bin/cross-ruby.rake
+index 8317a2a..6b5397b 100644
+--- i/tasks/bin/cross-ruby.rake
++++ w/tasks/bin/cross-ruby.rake
+@@ -113,13 +113,24 @@ RUBY_CC_VERSIONS.split(":").each do |ruby_cc_version|
+     file "#{build_dir}/Makefile" => [build_dir, source_dir] do |t|
+ 
+       options = [
+-        "--host=#{mingw_host}",
          "--target=#{mingw_target}",
          "--build=#{RUBY_BUILD}",
 -        '--enable-shared',