Test gnu, oldgnu, and posix formats

tests/incr01.at

@@ -48,7 +48,7 @@ separator
 directory/
 tar: Deleting `directory/bar'
 ],
-[],[],[],[gnu, oldgnu])
+[],[],[],[gnu, oldgnu, posix])
 
 AT_CLEANUP
 

tests/incremental.at

@@ -55,6 +55,6 @@ separator
 structure/
 structure/file
 ],
-[],[],[],[gnu,oldgnu])
+[],[],[],[gnu,oldgnu,posix])
 
 AT_CLEANUP