use Rust 1.46 instead of 1.49

Rust 1.49 does not work on the aarch64-musl target.
Fixes: #38

Signed-off-by: Andreea Florescu <[email protected]>

Author: andreeaflorescu

Dockerfile

@@ -1,5 +1,5 @@
 FROM ubuntu:18.04
-ARG RUST_TOOLCHAIN="1.49"
+ARG RUST_TOOLCHAIN="1.46"
 
 # Adding rust binaries to PATH.
 ENV PATH="$PATH:/root/.cargo/bin"

README.md

@@ -53,7 +53,7 @@ Example of running cargo build on the kvm-ioctls crate:
 
 ## Available Tools
 
-The container currently has the Rust toolchain version 1.35.0 and Python3.6.
+The container currently has the Rust toolchain version 1.46.0 and Python3.6.
 
 Python packages: