Fix orbutils recipe

recipes/book/recipe.toml

+[source]
+git = "https://gitlab.redox-os.org/redox-os/book.git"
+
+[build]
+template = "custom"
+script = """
+dir="${COOKBOOK_STAGE}/share/book"
+mkdir -pv "${dir}"
+mdbook build --dest-dir "${dir}" "${COOKBOOK_SOURCE}"
+"""

recipes/orbutils/recipe.toml

 [source]
 git = "https://gitlab.redox-os.org/redox-os/orbutils.git"
+branch = "slint_port/calculator"
 
 [build]
 template = "custom"
 script = """
 COOKBOOK_CARGO_FLAGS=(
-    --path "${COOKBOOK_SOURCE}/src"
+    --path "${COOKBOOK_SOURCE}/orbutils"
     --root "${COOKBOOK_STAGE}/ui"
     --locked
+    --no-track
 )
 cookbook_cargo
 COOKBOOK_CARGO_FLAGS=(
     --path "${COOKBOOK_SOURCE}/calculator"
     --root "${COOKBOOK_STAGE}/ui"
     --locked
+    --no-track
 )
 cookbook_cargo
 """