Using MinGW version of curl for Windows for patron

Turns out we actually need the MinGW version of curl, rather than 'libcurl-devel' which is for Cygwin's environment.

Author: nmburgan

configs/components/rubygem-patron.rb

@@ -11,8 +11,9 @@
   # Because this is only used in openbolt-runtime, and we don't build
   # our own curl there, we use the system version of libcurl to compile
   # native extensions against.
-  pkg.build_requires 'libcurl-devel' if platform.is_rpm? || platform.is_windows?
+  pkg.build_requires 'libcurl-devel' if platform.is_rpm?
   pkg.build_requires 'libcurl4-gnutls-dev' if platform.is_deb?
+  pkg.build_requires 'mingw64-x86_64-curl' if platform.is_windows?
 
   instance_eval File.read('configs/components/_base-rubygem.rb')
 end