Update Rust to nightly-2024-01-05 (#24)

This PR updates Rust to the most current (as of today)
`nightly-2024-01-05` and also adds two new targets:

* `riscv32ema-unknown-none-elf`
* `riscv64ema-unknown-none-elf`

The 64-bit target is completely untested, but I've added it anyway so
that it's ready once I start implementing 64-bit support in PolkaVM, and
the new 32-bit target is for when I'll finish adding support for the A
extension to the linker (which should be soon), which will be the new
default target triplet (mostly for compatibility, because a lot of 3rd
party crates assume `core::sync::atomic::*` stuff exists, and I don't
want to patch the world nor special-case Rust's standard library just
for our special snowflake use case).

The RV32E patch was also updated to the newest version.

Author: koute

build.sh

@@ -6,4 +6,4 @@ source config.sh
 
 # Will create component archives (dists) ./rust/build/dist
 cd rust
-./x dist rustc rust-std cargo rust-src rustfmt clippy --target $TOOLCHAIN_HOST_TRIPLET --target riscv32em-unknown-none-elf
+./x dist rustc rust-std cargo rust-src rustfmt clippy --target $TOOLCHAIN_HOST_TRIPLET,riscv32em-unknown-none-elf,riscv32ema-unknown-none-elf,riscv64ema-unknown-none-elf

config.sh

@@ -2,7 +2,7 @@
 
 param1=${1:-}
 
-export RUST_COMMIT=8d321f7a88f0ae27793c133390e507bf1f49125a
+export RUST_COMMIT=5113ed28ea1451a13eae3a05dca0dbabfd56f587
 
 # If -rust_commit specified then only export the rust commit variable
 if [ "$param1" == "-rust_commit" ]; then

package.sh

@@ -29,6 +29,8 @@ cd unpack
 inst "rustc-nightly-$TOOLCHAIN_HOST_TRIPLET"
 inst "rust-std-nightly-$TOOLCHAIN_HOST_TRIPLET"
 inst "rust-std-nightly-riscv32em-unknown-none-elf"
+inst "rust-std-nightly-riscv32ema-unknown-none-elf"
+inst "rust-std-nightly-riscv64ema-unknown-none-elf"
 inst "cargo-nightly-$TOOLCHAIN_HOST_TRIPLET"
 inst "rust-src-nightly"
 inst "rustfmt-nightly-$TOOLCHAIN_HOST_TRIPLET"