make the BUILD and TEST_REQUIRES attributes not extendable

It doesn't make sense to define them per package, so disallow that.
Global attributes are still copied to the configuration for each
package, so the handling of them can remain at package level where it
makes sense. (PROVIDES and REQUIRES are still package-specific of
course.)

Part of #363.

Author: jmairboeck

HaikuPorter/RecipeAttributes.py

@@ -33,6 +33,20 @@ def getRecipeFormatVersion():
 		'extendable': Extendable.NO,
 		'indexable': False,
 	},
+	'BUILD_PREREQUIRES': {
+		'type': RequiresList,
+		'required': False,
+		'default': [],
+		'extendable': Extendable.NO,
+		'indexable': False,
+	},
+	'BUILD_REQUIRES': {
+		'type': RequiresList,
+		'required': False,
+		'default': [],
+		'extendable': Extendable.NO,
+		'indexable': False,
+	},
 	'DISABLE_SOURCE_PACKAGE': {
 		'type': YesNo,
 		'required': False,
@@ -61,6 +75,13 @@ def getRecipeFormatVersion():
 		'extendable': Extendable.NO,
 		'indexable': False,
 	},
+	'TEST_REQUIRES': {
+		'type': RequiresList,
+		'required': False,
+		'default': [],
+		'extendable': Extendable.NO,
+		'indexable': False,
+	},
 
 	# indexable, i.e. per-source attributes
 	'ADDITIONAL_FILES': {
@@ -114,27 +135,6 @@ def getRecipeFormatVersion():
 		'extendable': Extendable.INHERITED,
 		'indexable': False,
 	},
-	'BUILD_PREREQUIRES': {
-		'type': RequiresList,
-		'required': False,
-		'default': [],
-		'extendable': Extendable.INHERITED,
-		'indexable': False,
-	},
-	'BUILD_REQUIRES': {
-		'type': RequiresList,
-		'required': False,
-		'default': [],
-		'extendable': Extendable.INHERITED,
-		'indexable': False,
-	},
-	'TEST_REQUIRES': {
-		'type': RequiresList,
-		'required': False,
-		'default': [],
-		'extendable': Extendable.INHERITED,
-		'indexable': False,
-	},
 	'CONFLICTS': {
 		'type': RequiresList,
 		'required': False,