Fix bug in test_tools that prevented building is separate directory.
Use 'srcdir' from sysconfig instead of 'projectbase' to build a
path to the Tools directory. 'projectbase' is the path of the build
directory, not the source directory.
diff --git a/Lib/test/test_tools.py b/Lib/test/test_tools.py
index 564b747..3b89178 100644
--- a/Lib/test/test_tools.py
+++ b/Lib/test/test_tools.py
@@ -19,7 +19,7 @@
# and run the tests in that case too?
raise unittest.SkipTest('test irrelevant for an installed Python')
-srcdir = sysconfig.get_config_var('projectbase')
+srcdir = sysconfig.get_config_var('srcdir')
basepath = os.path.join(os.getcwd(), srcdir, 'Tools')
scriptsdir = os.path.join(basepath, 'scripts')