#undef IN/OUT for Windows builds
#undef IN/OUT for Windows builds

Summary: wangle's HandlerDir has values IN, OUT, BOTH. On Windows IN/OUT unfortunately are #defined to nothing when including very basic headers like <windows.h>. This patch here resolves this conflict with #undef. This is not expected to cause problems with the usual #include file order of system-includes-first.

Test Plan: fbmake runtests for wangle

Reviewed By: yfeldblum@fb.com

Subscribers: fugalh, jsedgwick, yfeldblum

FB internal diff: D2234663

Tasks: 7356900

Signature: t1:2234663:1436564995:777a0b9f26b272ecfcf8aab12f9df32f233712db

jamperry/wangle,Orvid/wangle,rklabs/wangle,facebook/wangle,mzhaom/wangle,Orvid/wangle,mzhaom/wangle,raphaelamorim/wangle,facebook/wangle,Dalzhim/wangle,raphaelamorim/wangle,AresTao/wangle,rklabs/wangle,AresTao/wangle,facebook/wangle,orian/wangle,Dalzhim/wangle,orian/wangle,jamperry/wangle