* Let us time minify
* Making AVX-512 available by default.
* Silencing some maybe-uninitialized warning under GCC (warning appears in the standard library).
* Making the Python amalgamation script a bit more Windows friendly.
* We do not try to silence -Wmaybe-uninitialized under clang.
This eliminates the possibility of inlining target failures for ondemand
Also makes it so we always compile common architectures needed by simdjson.cpp in simdjson.h, since amalgamation has no way to reason about whether to include / exclude it.
Daniel Lemire