x86: expose dirty/accessed flags for getFlags/setFlags
scripts: buildLibc updated to work when run on Pedigree. There's absolutely no reason to go to all this effort anymore. See #161.
posix: completely broken new userspace memset. Writes too many bytes, causes segfaults.
posix: mmap() with MAP_PHYS_OFFSET now maps WriteCombine, as the only thing that uses it is stuff mapping the root framebuffer.