getdeps: Extend is_objfile() to Windows class to only select files with .exe extension
getdeps: Extend is_objfile() to Windows class to only select files with .exe extension

Summary: is_objfile() is used to find the executable files in the given project. Getdeps will only find and copy the dependencies of the binaries identified by this function. On Windows we will copy only the dependencies for an exe file.

Reviewed By: chadaustin

Differential Revision: D16185962

fbshipit-source-id: f6b5089401b242514a845e3a97b3804051d93c1c

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift