[Truffle] Tag some failing specs.

Author: chrisseaton

spec/truffle/tags/core/array/intersection_tags.txt

@@ -2,3 +2,9 @@ fails:Array#& creates an array with no duplicates
 fails:Array#& creates an array with elements in order they are first encountered
 fails:Array#& properly handles recursive arrays
 fails:Array#& determines equivalence between elements in the sense of eql?
+fails:Array#& does not call to_ary on array subclasses
+fails:Array#& does return subclass instances for Array subclasses
+fails:Array#& tries to convert the passed argument to an Array using #to_ary
+fails:Array#& tries to convert the passed argument to an Array using #to_ary
+fails:Array#& does not modify the original Array
+fails:Array#& creates an array with elements common to both arrays

spec/truffle/tags/core/string/split_tags.txt

@@ -23,3 +23,4 @@ fails:String#split with Regexp taints an empty string if self is tainted
 fails:String#split with Regexp retains the encoding of the source string
 fails:String#split with Regexp splits a string on each character for a multibyte encoding and empty split
 fails:String#split with Regexp returns an ArgumentError if an invalid UTF-8 string is supplied
+fails:String#split with Regexp doesn't taints the resulting strings if the Regexp is tainted