[csplit] Additional preparation for proper replacement of arosc.library with split...

[csplit] Additional preparation for proper replacement of arosc.library with split versions

 * Added rellib libraries in some module .conf file where arosc was already
   a rellib
 * Added -nostdc link option in addition to -noarosc for programs that
   don't want shared C library code.
 * Added stdc(io) to uselibs= of some modules where needed.
   Default is to not link modules with it but because these libraries
   are now peropenerbase they can be added to libraries when certain
   precautions are made.
 * Open stdc.library for some of the AHI drivers.
   Preparation for moving math and string functions into stdc.library.
   These drivers don't use autoopening of libraries.
 * Corrected usage of stdc name in comments in a few places where
   it crept into main trunk during previous merging.

git-svn-id: https://svn.aros.org/svn/aros/trunk@48030 fb15a70f-31f2-0310-bbcc-cdcc74a49acc