Add APR_EOL_STR for a platform specific text delimiter, provided by

  Add APR_EOL_STR for a platform specific text delimiter, provided by
  apr.h (defined in apr.h.in and apr.hw).  This is needed -only- in APR
  created files (true raw files) such as logs.  It is not required in any
  splat to screen (stderr/stdout) formatting, nor any html markup.

  Some other modules slipped through in the prior apr_strings.h commit.
  Sorry 'bout that.

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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85878 13f79535-47bb-0310-9956-ffa450edef68