Log Message:
(devel/MoarVM) Updated 2021.05 to 2021.06

https://www.moarvm.org/releases.html
2021.06

6model:

    [0d63ddad] Set sc.idx during deserialization to avoid costly lookup later

Core:

    [5ba30ed8,ae024a49,d8a16dfd,77756158] Try to trap concurrent hash
    accesses [c53c0cdb] Fix a case of heap-use-after-free rarely
    affecting t/spec/S17-promise/nonblocking-await.t

Tooling/Build:

    [9b7ab7c4] Put include paths needed for HLL builds in config
    [91b1ccf6,bb767ece,192ea6bb] Define _GNU_SOURCE for GNU builds
    [12cbafce] Disable GCC pragmas when using MSVC
    [4751ca6d] Add note about macro confusion between gcc and clang