Try test files rather than test symlinks

Looking at some of the failing test output, I think some of the failures
might just be because the scripts that are failing are symlinks to
scripts in the source directory, rather than script files.  Fix that the
easy way: remove the symlinks and use the actual files.

python-flask.cygport

@@ -136,6 +136,13 @@ done
 
 src_test () {
 	cd "$B"
+
+	# Some tests fail because of how they resolve the symlinks.  To avoid
+	# that, make the tests directory be a straightforward copy rather than
+	# a set of symlinks.
+	rm -r tests
+	cp -r "$S"/tests ./tests
+
 	tox
 }