Correct GYP issue causing build failures on Windows.
Correct GYP issue causing build failures on Windows.

Change-Id: Icd423f5406d7eab60fe07aa7a88322ac43e7fa3d
Reviewed-on: http://review.couchbase.org/60805
Reviewed-by: Mark Nunberg <dab05a0fe859c5cb93882b2a75a0d613501b07be@couchbase.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

corbinu/couchnode,brett19/couchnode,couchbase/couchnode,corbinu/couchnode,couchbase/couchnode,brett19/couchnode,couchbase/couchnode,brett19/couchnode,couchbase/couchnode,corbinu/couchnode