RFR 8009315 "F# on PATH breaks Cygwin tools (mkdir, echo, mktemp ...)"

[Tim Bell]

Hello

Here is the bug report:
    http://bugs.sun.com/view_bug.do?bug_id=8009315

With Visual Studio 2010 this is an issue only for users who install F#.

With VS 2012, F# is always installed and this becomes a stopper issue 
for all Windows users trying to build.

I'd like to get this small fix out of the way.

http://cr.openjdk.java.net/~tbell/8009315/webrev.00/

Thanks in advance-

Tim