Merge remote-tracking branch 'lucas/compiler_abstract_fix'
lib: adds missing import of math.h in standard library

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
contrib/sort_downloads: fix missing C include

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib: changes the behavior of Coll::rand to behave like first

It will now return a non-nullable and `abort` when empty.

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
Merge remote-tracking branch 'lucas/unwind_integration'
Merge remote-tracking branch 'alexis/various-fixes'
nitg: Added option to bind C function names to Nit names when generating a Stack Trace (Requires gperf)

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>