coding style cleanup, use C99
bedwarf: add option to not use .cfi_sections

Old gnu assemblers don't support it (unfortunately we are using such old
binutils in the invasic project - gaislers sparc-elf-gcc-4.4.2 package)
remove commutative op_flag in be nodes for now

It doesn't make sense as long as we can't set proper oparity_binary in
the be node scripts at the same time. Furthermore the benefits of the
flag should be marginal to nothing here.
use cparser-beta for additional syntax/warning checks if available
Make fp-vrp analysis result available to other optimizations.

Factor out the following function:

/* Compute VRP fixpoint.  The Result is available via links to
 * vrp_bitinfo*, allocated on client_obst. */
void fp_vrp_analyze(ir_graph* const irg, struct obstack *client_obst);
Extract fp-vrp analysis part into ir/ana/