Add include files so that IceCompilerServer.cpp can compile on MSC.

Add include files so that IceCompilerServer.cpp can compile on MSC.

A recent change to IceCompilerServer.cpp was added to allow fatal
errors to return exit status zero. However, this code called ::write
(a C function) that is not defined when compiling with MSC. This CL
adds includes to fix this problem.

BUG=None
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1379613005 .