Bug 795769 - Add "bootstrap" command to mach; r=ted

The command is currently just a proxy into mozboot.

DONTBUILD (NPOTB)

mach

@@ -20,6 +20,7 @@ if sys.version_info[0] == 2 and sys.version_info[1] < 7:
 # TODO Bug 794506 Integrate with the in-tree virtualenv configuration.
 SEARCH_PATHS = [
     'python/mach',
+    'python/mozboot',
     'python/mozbuild',
     'build',
     'build/pymake',
@@ -37,6 +38,7 @@ SEARCH_PATHS = [
 # Individual files providing mach commands.
 MACH_MODULES = [
     'layout/tools/reftest/mach_commands.py',
+    'python/mozboot/mozboot/mach_commands.py',
     'testing/mochitest/mach_commands.py',
     'testing/xpcshell/mach_commands.py',
 ]

python/mozboot/mozboot/mach_commands.py

@@ -0,0 +1,23 @@
+# 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/.
+
+from __future__ import unicode_literals
+
+from mozbuild.base import MozbuildObject
+
+from mach.base import CommandArgument
+from mach.base import CommandProvider
+from mach.base import Command
+
+@CommandProvider
+class Bootstrap(MozbuildObject):
+    """Bootstrap system and mach for optimal development experience."""
+
+    @Command('bootstrap',
+        help='Install required system packages for building.')
+    def bootstrap(self):
+        from mozboot.bootstrap import Bootstrapper
+
+        bootstrapper = Bootstrapper()
+        bootstrapper.bootstrap()