rust-cross: Add riscv32 data layout information
rust-cross: Add riscv32 data layout information

This was generated with:
    clang --target=riscv32  -emit-llvm -S -x c /dev/null -o aaa |  cat aaa | grep "target datalayout"

Signed-off-by: Alistair Francis <52ecf00b70a50079ae8d5fa09b9af6904950b63c@wdc.com>

meta-rust/meta-rust,meta-rust/meta-rust,meta-rust/meta-rust,meta-rust/meta-rust,meta-rust/meta-rust