The build of aelparse was still broken in some cases, so instead of having to

keep figuring out workarounds for build issues on various platforms, just go
ahead and remove what started all of this.  Two instances of ast_calloc have
been changed to calloc in pbx/ael/ael.y.

ast_copy_string isn't actually needed here because the only place it is used is
in ast_expr2f.c.  However, the utils Makefile already builds its own
ast_expr2f.o with -DSTANDALONE, which makes it use strncpy instead of
ast_copy_string.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@24115 65c4cc65-6c06-0410-ace0-fbb531ad65f3