As part of enabling OS abstractions, the OS specific Makefile is now

responsible for copying required header files to src/main, not Configure.
Also link with the OS abstraction libary as the last module.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79187 13f79535-47bb-0310-9956-ffa450edef68