THRIFT-2809: .gitignore updated - compiler/cpp/Release added

Client: Build
Patch: Darren Thornton

This closes #256
diff --git a/.gitignore b/.gitignore
index a891595..f99691a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,6 +46,7 @@
 /autoscan.log
 /autoscan-*.log
 /compiler/cpp/Debug
+/compiler/cpp/Release
 /compiler/cpp/libparse.a
 /compiler/cpp/src/thriftl.cc
 /compiler/cpp/src/thrifty.cc