ci: Try building

Install the target support for rust, and try running twister to see what
happens.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

.github/workflows/build.yml

@@ -37,12 +37,20 @@ jobs:
           toolchains: arm-zephyr-eabi
             # TODO: Also bring in riscv.
 
+      - name: Install Rust Targets
+        shell: bash
+        run: |
+          rustup target add riscv32i-unknown-none-elf
+          rustup target add riscv64imac-unknown-none-elf
+          rustup target add thumbv6m-none-eabi
+          rustup target add thumbv7em-none-eabi
+          rustup target add thumbv7m-none-eabi
+          rustup target add thumbv8m.main-none-eabi
+
       - name: Build firmware
         working-directory: zephyr-rust-lang
         shell: bash
         run: |
-          set -x
-          pwd
-          echo $ZEPHYR_BASE
-          df -h
           cargo --version
+
+          west twister -T samples -v --inline-logs --integration