From: Eric Joldasov
* Update to use llvm-r1 eclass instead of llvm, zig-build and
zig-toolchain functions instead of local get_zig_mcpu etc. functions.
* Port "llvm USE-flag" and "removing memory limit flags" from
ebuild.
* Stage3 compilation is unified by combining build.zig options,
From: Eric Joldasov
* Update to use llvm-r1 eclass instead of llvm, zig-build and
zig-toolchain functions instead of local get_zig_mcpu etc. functions.
* Port "llvm USE-flag" and "removing memory limit flags" from
ebuild.
* Stage3 compilation is unified by combining build.zig options,
