build: deterministic package order

The order of packages handed over to the ImageBuilder isn't stable when
using `diff_packages`, sort the packages afterwards to be deterministic.

This recently introduced a reproducibility issues where packages are in
different order, resulting packages to be sometimes installed as
dependencies (Auto-Install in OPKG) and sometimes not.

Signed-off-by: Paul Spooren <mail@aparcar.org>

asu/build.py

@@ -226,7 +226,7 @@ def download_file(filename: str, dest: str = None):
             "make",
             "manifest",
             f"PROFILE={req['profile']}",
-            f"PACKAGES={' '.join(req.get('packages', ''))}",
+            f"PACKAGES={' '.join(sorted(req.get('packages', [])))}",
             "STRIP_ABI=1",
         ],
         text=True,
@@ -294,7 +294,7 @@ def download_file(filename: str, dest: str = None):
         "make",
         "image",
         f"PROFILE={req['profile']}",
-        f"PACKAGES={' '.join(req.get('packages', []))}",
+        f"PACKAGES={' '.join(sorted(req.get('packages', [])))}",
         f"EXTRA_IMAGE_NAME={packages_hash}",
         f"BIN_DIR={req['store_path'] / bin_dir}",
     ]