Add Haddock /Since: 22.214.171.124/ comments to symbols
This commit retroactively adds /Since: 126.96.36.199/ annotations to symbols
newly added/exposed in base-188.8.131.52 (as shipped with GHC 7.6.1).
See also 6368362f which adds the respective annotation for symbols newly
added in base-184.108.40.206 (that goes together with GHC 7.8.1).
Signed-off-by: Herbert Valerio Riedel <firstname.lastname@example.org>