Merge r1539603 from trunk:

Switch gen_test_char from an APR app to a plain C app to
give more flexibility to the build systems.

Submitted by: minfrin


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/branches/1.5.x@1539605 13f79535-47bb-0310-9956-ffa450edef68