Rtools UCRT64 GCC 10.3.0 build recipe, mirrored from
https://github.com/r-windows/rtools-ucrt (formerly r-windows/rtools-testing),
directory mingw-w64-gcc, commit c5344cc8c7e310ee4eee513b2381af2e75d65cb9
(2022-01-27), pkgver 10.3.0, pkgrel 9804.

This is the patch set and PKGBUILD applied on top of the upstream
gcc-10.3.0.tar.xz (sha256 64f404c1a650f27fc33da242e1f2df54952e3963a49e06e73f6940f3223ac344,
also offered beside this file). The compiler built from them is the one the
openblas-libs project (scipy-openblas64) installs through Chocolatey
`rtools 4.0.0.20220206` (the c:\rtools40\ucrt64 toolchain) and which produced the
statically linked libgfortran inside the Windows OpenBLAS DLL shipped in the
numpy wheel. Every PKGBUILD checksum was verified against these files.
