protobuf: bump to version 3.0.0

It also changes the python-protobuf.hash file to be a symbolic link to
../protobuf/protobuf.hash so that both hash files don't have to be
updated when protobuf is bumped.

In addition, the 0001-disable-unneeded-build-dependencies.patch patch
from package/python-protobuf/ is removed because it has been merged
upstream.

Signed-off-by: Jan Heylen <heyleke@gmail.com>
[Thomas: fix the build of python-protobuf.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-protobuf/0001-disable-unneeded-build-dependencies.patch

@@ -1,37 +0,0 @@
-From 7e7db7225e227905acabfa2149152ece21c93e70 Mon Sep 17 00:00:00 2001
-From: Steven Noonan <steven@uplinklabs.net>
-Date: Sun, 8 Nov 2015 09:03:00 -0800
-Subject: [PATCH] python-protobuf: don't require google-apputils
-
-This dependency is totally superfluous for successfully building/running
-python-protobuf. It's only "required" at build time and is not staged into the
-install directory, but it isn't even really required for a successful build.
-
-Signed-off-by: Steven Noonan <steven@uplinklabs.net>
----
- python/setup.py | 2 --
- 1 file changed, 2 deletions(-)
-
-diff --git a/python/setup.py b/python/setup.py
-index 2450a77..db6f497 100755
---- a/python/setup.py
-+++ b/python/setup.py
-@@ -160,7 +160,6 @@ if __name__ == '__main__':
-         packages = [ 'google' ],
-         namespace_packages = [ 'google' ],
-         test_suite = 'setup.MakeTestSuite',
--        google_test_dir = "google/protobuf/internal",
-         # Must list modules explicitly so that we don't install tests.
-         py_modules = [
-           'google.protobuf.internal.api_implementation',
-@@ -189,7 +188,6 @@ if __name__ == '__main__':
-           'google.protobuf.text_format'],
-         cmdclass = { 'clean': clean, 'build_py': build_py },
-         install_requires = ['setuptools'],
--        setup_requires = ['google-apputils'],
-         ext_modules = ext_module_list,
-         url = 'https://developers.google.com/protocol-buffers/',
-         maintainer = maintainer_email,
--- 
-2.6.2
-

package/python-protobuf/python-protobuf.hash

@@ -1,2 +0,0 @@
-# locally computed
-sha256  2667b7cda4a6bc8a09e5463adf3b5984e08d94e72338277affa8594d8b6e5cd1  protobuf-v2.6.1.tar.gz

package/python-protobuf/python-protobuf.hash

@@ -0,0 +1 @@
+../protobuf/protobuf.hash