[ansible] update rust-embedded requirements

ansible/playbooks/rust-embedded.yml

@@ -1,27 +1,34 @@
 - hosts: all
   tasks:
 
-  # https://rust-embedded.github.io/book/intro/install.html
+    # https://docs.rust-embedded.org/discovery/03-setup/index.html
+
+    - name: install cargo dependencies
+      command: cargo install {{ item.key }}
+      args:
+        creates: ~/.cargo/bin/{{ item.value }}
+      with_dict:
+        itm: itmdump
+        cargo-binutils: cargo-size
 
     - name: add rust target
       command: rustup target add thumbv7em-none-eabihf
 
-  - name: install binutils
+    # Is this really necessary?
-    command: cargo install cargo-binutils
-    args:
-      creates: ~/.cargo/bin/cargo-size
-
     - name: install llvm-tools-preview
       command: rustup component add llvm-tools-preview
 
     # https://rust-embedded.github.io/book/intro/install/macos.html
+    # https://docs.rust-embedded.org/discovery/03-setup/macos.html
 
     - name: install gcc-arm-embedded
       homebrew:
         name: armmbed/formulae/arm-none-eabi-gcc
 
-  - name: install openocd and qemu
+    - name: install brew dependencies
       homebrew:
         name:
+          - gdb
+          - minicom
           - openocd
           - qemu