ASLR is too aggressive; fragments address space

[waddlesplash]

On 32-bit Haiku, the ASLR implementation randomizes too much, and winds up fragmenting the address space to the point where after 1/4 (~500MB) of it is used, area creation can begin failing.

For now (hrev53143) I've disabled ASLR for malloc; this makes the system much more stable (and wastes less memory too, it appears.)

[waddlesplash]

CC korli: this could probably be why OpenJDK has such problems on 32-bit, because it uses mmap() to get memory instead of malloc().