Message2932

Patch is uploaded for the bug id [1815110]. The eval,
execfile functions now accept any mapping type for the 
locals parameter. Previously this had to be a regular 
Python dictionary.

test_builtin.py is the testcase file. I copied the
test_general_eval and test_execfile testcases from 
cpython. I did one change, which I moved 'unlink(TESTFN)'
statement before 'import os' statement in test_execfile,
as it was giving FileNotFound error.