CHROMIUM: lib: Export symbol for minmax_running_min

And move win_minmax.o from lib-y to obj-y.

This is a port from chromeos-3.18 to chromeos-4.14-gw of CL:1121776.

BUG=b:138685581
TEST=None

Change-Id: Icb5c2155b7fe1d1bea522135272485ca417b1976
Signed-off-by: Danny J. Mitzel <mitzel@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1727770


Tested-by: Danny Mitzel <mitzel@google.com>
Commit-Ready: Danny Mitzel <mitzel@google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Kan Yan <kyan@chromium.org>