[IOT-1986] Windows: Work around SCons race condition

[IOT-1986] Windows: Work around SCons race condition

These sporadic linker errors become even more frequent when adding
more static LIBs into a single target DLL.

Change-Id: I44d2cfeda61a08cbc29cb3d7f685b87ea1cb8b9e
Signed-off-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18767
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Omar Maabreh <omarm@microsoft.com>
Reviewed-by: Dave Thaler <dthaler@microsoft.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Mike Fenelon <mike.fenelon@microsoft.com>