Add linkage to swiftSwiftOnoneSupport

Author: phausler

build.py

@@ -23,6 +23,9 @@
 	foundation.CFLAGS = '-DDEPLOYMENT_TARGET_MACOSX '
 	foundation.LDFLAGS = '-licucore -twolevel_namespace -Wl,-alias_list,CoreFoundation/Base.subproj/DarwinSymbolAliases -sectcreate __UNICODE __csbitmaps CoreFoundation/CharacterSets/CFCharacterSetBitmaps.bitmap -sectcreate __UNICODE __properties CoreFoundation/CharacterSets/CFUniCharPropertyDatabase.data -sectcreate __UNICODE __data CoreFoundation/CharacterSets/CFUnicodeData-L.mapping -segprot __UNICODE r r '
 
+if Configuration.current.build_mode == Configuration.Debug:
+	foundation.LDFLAGS += '-lswiftSwiftOnoneSupport'
+
 # For now, we do not distinguish between public and private headers (they are all private to Foundation)
 # These are really part of CF, which should ultimately be a separate target
 foundation.ROOT_HEADERS_FOLDER_PATH = "${PREFIX}/lib/swift"