Save on incremental build time. libhttpd depends on gen_test_char and

  Save on incremental build time.  libhttpd depends on gen_test_char and
  libapr.  gen_test_char truly needs only apr ... however, this causes the
  libhttpd to refresh the static apr and dynamic libapr.

  Now... libapr.dll is in the wrong place to actually start gen_test_char.
  That doesn't affect us though - the only bits gen_test_char actually
  needs are APR_HAS/HAVE flags and the apr_isfoo(char) macros.

  So this lightens the load while not harming the build process.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95099 13f79535-47bb-0310-9956-ffa450edef68