[csplit] Remove arosc.library/libarosc.static.a; compiler clib is now exterminated.

[csplit] Remove arosc.library/libarosc.static.a; compiler clib is now exterminated.

 * Remove rellib statements in module .conf file
 * Remove -noarosc option from gcc. Removed also it's usage in make.tmpl and
   mmakfile.src files.
 * mmakefile.src: Removed metadepencies for linklibs-clib or linklibs-arosc
   Just remove or replace it with linklibs-rom. Added metadependency for
   building stdc.library, stdcio.library and posixc.library
 * bootfloppy: Replace arosc.library with stdc.library + stdcio.library
 * remove sys/arosc.h from include files
 * Remove arosc.static from mmakefiles; implementation based on code from Jason S. McMullan
 * metadenpendencies fix by Jason S. McMullan
 * BGUI: bguiclass_lib.c: Open stdc.library
 * Update documentation/developers/specification/abiv1.en

git-svn-id: https://svn.aros.org/svn/aros/trunk@48056 fb15a70f-31f2-0310-bbcc-cdcc74a49acc