Fix #349: Verify pkgname against folder name after replacing vars

This fixes a regression introduced in 7fe2bc18c3.
Sorry for the inconvenience!

pmb/parse/apkbuild.py

@@ -128,7 +128,7 @@ def apkbuild(args, path):
                     value = []
             ret[attribute] = value
 
-    # Add missing entries
+    # Add missing keys
     for attribute, options in pmb.config.apkbuild_attributes.items():
         if attribute not in ret:
             if options["array"]:
@@ -136,6 +136,10 @@ def apkbuild(args, path):
             else:
                 ret[attribute] = ""
 
+    # Properly format values
+    ret = replace_variables(ret)
+    ret = cut_off_function_names(ret)
+
     # Sanity check: pkgname
     suffix = "/" + ret["pkgname"] + "/APKBUILD"
     if not os.path.realpath(path).endswith(suffix):
@@ -145,7 +149,5 @@ def apkbuild(args, path):
                            " the folder, that contains the APKBUILD!")
 
     # Fill cache
-    ret = replace_variables(ret)
-    ret = cut_off_function_names(ret)
     args.cache["apkbuild"][path] = ret
     return ret