Change print statements to work in python3

This is part of a series of changes to introduce Python3 support.

Change-Id: I373be5de7141aa127d7debdbce1df39148dbec32

subcmds/forall.py

@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
 import fcntl
 import re
 import os
@@ -183,7 +184,7 @@ terminal and are not redirected.
       if not os.path.exists(cwd):
         if (opt.project_header and opt.verbose) \
         or not opt.project_header:
-          print >>sys.stderr, 'skipping %s/' % project.relpath
+          print('skipping %s/' % project.relpath, file=sys.stderr)
         continue
 
       if opt.project_header: