added %meme tests to hints.hoon
++ test-hint-xray
~> %xray.[1 leaf+"test-hint-xray ~"]
~
+:: test that these memory-report hints
+:: are safe to run or ignore
+++ test-hilt-meme
+ ~> %meme
+ ~
+++ test-hint-meme
+ ~> %meme.[1 leaf+"test-hint-meme ~"]
+ ~
:: test that the hilt bout hint
:: is safe to run or ignore
++ test-hilt-bout
