Move to test/.excludes-prism

Author: nobu

test/.excludes-prism/TestSetTraceFunc.rb

@@ -0,0 +1,2 @@
+exclude(:test_return, "[Bug #20457]")
+exclude(:test_return2, "[Bug #20457]")

test/ruby/test_settracefunc.rb

@@ -196,8 +196,6 @@ def test_class
   end
 
   def test_return # [ruby-dev:38701]
-    pend if RUBY_DESCRIPTION.include?("+PRISM")
-
     events = []
     name = "#{self.class}\##{__method__}"
     eval <<-EOF.gsub(/^.*?: /, ""), nil, name
@@ -246,8 +244,6 @@ def test_return # [ruby-dev:38701]
   end
 
   def test_return2 # [ruby-core:24463]
-    pend if RUBY_DESCRIPTION.include?("+PRISM")
-
     events = []
     name = "#{self.class}\##{__method__}"
     eval <<-EOF.gsub(/^.*?: /, ""), nil, name