dev-lang/python2.7: uprev to python 2.7.15

Uprev to 2.7.15, we apply the following changes from the 2.7.15 ebuild:
 * new Copyright
 * subscribe to libressl subslot
 * stop applying -disable-nis.patch
 * add --with-computed-gotos <- available since python 2.7.11
 * cosmetic line continuation fixup

Changes since chromium 2.7.10 ebuild:
 * patches dropped since 2.7.10:
   * python-2.7.3-unique-semaphore-name.patch; in v2.7.15 as:
     674a3cd20b Issue #24303: Fix random EEXIST upon multiprocessing semaphores creation with Linux PID namespaces enabled.
   * python-2.7.17-getentropy.patch; in v2.7.15 as:
     01bdbad3e9 Don't use getentropy() on Linux
 * Use EPATCH_FORCE="yes" because gentoo's 2.7.15 patches do not follow
   the canonical naming form.

Some notable differences from upstream:
 * Still using EAPI=5 since building SDK does not yet allow EAPI=6.
 * Includes Chromium Specific PGO impelementation
   + This CL also updates the Chromium specific PGO PROF_VERSION.
 * Maintains existing ChromiumOS specifc changes
 * python_disable_pyc
   - this was removed in gentoo between 2.7.3 & 2.7.4, still useful?
 * An ancient pyconfig link dating from when we imported 2.7.3-r3 in
   commit 4cfb44a23528c4e05a87d79268cf473d6d2cbd87.
 * An ancient workaround for an old $D/$ED bug w/binpkgs in portage from
   commit d7685db02b573ae07ad7397f574801c5a2ee36d2

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>

BUG=chromium:736313
TEST=PreCQ and SDK tryjob

Change-Id: I61077f2b1a412bcde79386ca79d4b09353863e0c
Reviewed-on: https://chromium-review.googlesource.com/1627149
Tested-by: Daniel Kurtz <djkurtz@chromium.org>
Commit-Ready: Daniel Kurtz <djkurtz@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/dev-lang/python/files/pydoc.init b/dev-lang/python/files/pydoc.init
old mode 100755
new mode 100644
index 19b63e3..f8e0563
--- a/dev-lang/python/files/pydoc.init
+++ b/dev-lang/python/files/pydoc.init
@@ -1,26 +1,24 @@
-#!/sbin/runscript
-# Copyright 1999-2008 Gentoo Technologies, Inc.
+#!/sbin/openrc-run
+# Copyright 1999-2016 Gentoo Foundation
 # Distributed under the terms of the GNU General Public Licence v2
-# $Header: /var/cvsroot/gentoo-x86/dev-lang/python/files/pydoc.init,v 1.2 2008/06/30 15:10:28 hawking Exp $
-
-depend() {
-	need net
-}
 
 start() {
-	if [ -z $PYDOC_PORT ] ; then
+	local pydoc_port="${@PYDOC_PORT_VARIABLE@-${PYDOC_PORT}}"
+
+	if [ -z "${pydoc_port}" ]; then
 		eerror "Port not set"
 		return 1
 	fi
-	ebegin "Starting pydoc server on port $PYDOC_PORT" 
+
+	ebegin "Starting pydoc server on port ${pydoc_port}" 
 	start-stop-daemon --start --background --make-pidfile \
-			  --pidfile /var/run/pydoc.pid \
-			  --startas /usr/bin/pydoc -- -p $PYDOC_PORT
+			  --pidfile /var/run/@PYDOC@.pid \
+			  --exec /usr/bin/@PYDOC@ -- -p "${pydoc_port}"
 	eend $?
 }
 
 stop() {
 	ebegin "Stopping pydoc server"
-	start-stop-daemon --stop --quiet --pidfile /var/run/pydoc.pid
+	start-stop-daemon --stop --quiet --pidfile /var/run/@PYDOC@.pid
 	eend $?
 }