wrote first version for setup rustup

rustup.sh

@@ -0,0 +1,24 @@
+function check_rustup {
+    if type rustup >/dev/null; then
+        rustup --version
+        echo "rustup is installed!"
+        return 0
+    else
+        echo "rustup not found"
+        echo "starting to install rustup.."
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+        return 4
+    fi
+}
+
+check_rustup
+echo "updateing rustup.."
+rustup update
+echo "installing llvm-tools.."
+rustup component add llvm-tools
+rustup component add rustfmt
+#rustup target add thumbv6m-none-eabi    # Cortex-M0 and Cortex-M0+
+#rustup target add thumbv7m-none-eabi    # Cortex-M3
+#rustup target add thumbv7em-none-eabi   # Cortex-M4 and Cortex-M7 (no FPU)
+#rustup target add thumbv7em-none-eabihf # Cortex-M4F and Cortex-M7F (with FPU)
+