Makefile: improved build flags
Makefile: use -fno-pic to compile modules
without this flag kernel can't load modules
Makefile: more build flags
Makefile: adding config variable for Os/O2/O3 compilation
fix wrong build flags setup and add more build flags
Makefile: improve build flags
Makefile: enable graphite loop optimization
Makefile: improved build flags
Makefile: use old build flags and added -fgraphite flag. performace are higher
Revert "Makefile: remove -ftracer flags to keep the kernel smaller and make some order"

This reverts commit 58d21fdb3860e09c4c00d8342474b02ba5968b17.

Conflicts:

	Makefile
	arch/arm/Makefile