Address feedback from ekr, sync. up with the default branch, and prepare for more downstream testing - cmd/platlibs.mk by using ifdef instead of ifeq for consistency and doesn't change WINNT part - cmd/platlibs.mk expanded for the case of static libraries - remove potentially confusing comments from top Makefile - ready to make experimental source tar ball for more downstream testing

# 
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
CORE_DEPTH = .
DEPTH      = .

IMPORTS =	nspr20/v4.8 \
		$(NULL)

RELEASE = nss

DIRS = coreconf lib cmd external_tests