correct install path for orbutils and orbterm

Changing default install path from /bin to /usr/bin caused the Orbutils and Orbterm recipes to put the binaries in /ui/usr/bin . This MR corrects it to /ui/bin .

recipes/gui/orbterm/recipe.toml

@@ -4,8 +4,12 @@ git = "https://gitlab.redox-os.org/redox-os/orbterm.git"
 [build]
 template = "custom"
 script = """
-COOKBOOK_STAGE="${COOKBOOK_STAGE}/ui"
-cookbook_cargo
+"${COOKBOOK_CARGO}" install \
+        --path "${COOKBOOK_SOURCE}" \
+        --root "${COOKBOOK_STAGE}/ui" \
+        --locked \
+        --no-track \
+        ${install_flags}
 """
 
 [package]