* Update wasi-libc to a00bf321eeeca836ee2a0d2d25aeb8524107b8cc It includes a port of emscripten's allocator that performs performs much better than the old one. Most importantly, it includes the prerequisites to later add support for POSIX threads.
Update our copy of wasi-libc up to the commit 30094b6ed05f19cee102115215863d185f2db4f0 from the upstream repository.
