Fix up t/02-rakudo/01-is_approx.t tests
Fix up t/02-rakudo/01-is_approx.t tests

The author of planck tests wrote them without any regard to `e-34`
part of the number and adjusted the numbers in the decimal portion
alone, expecting changes to be of 1e-5 magnitude when they were
actually of 1e-39 magnitude.

Fix by shifting the original value by expected differences instead.

tony-o/rakudo,lucasbuchala/rakudo,labster/rakudo,nbrown/rakudo,softmoth/rakudo,Gnouc/rakudo,nbrown/rakudo,awwaiid/rakudo,usev6/rakudo,lucasbuchala/rakudo,lucasbuchala/rakudo,tony-o/rakudo,raydiak/rakudo,Gnouc/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,Gnouc/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,salortiz/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,nbrown/rakudo,lucasbuchala/rakudo,rakudo/rakudo,MasterDuke17/rakudo,raydiak/rakudo,softmoth/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,awwaiid/rakudo,nbrown/rakudo,tony-o/rakudo,softmoth/rakudo,salortiz/rakudo,usev6/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,usev6/rakudo,salortiz/rakudo,raydiak/rakudo,usev6/rakudo,salortiz/rakudo,nbrown/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,tbrowder/rakudo,tony-o/rakudo,tbrowder/rakudo,tony-o/rakudo,Gnouc/rakudo,nbrown/rakudo,labster/rakudo,softmoth/rakudo,labster/rakudo,awwaiid/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,salortiz/rakudo,labster/rakudo,softmoth/rakudo,rakudo/rakudo,usev6/rakudo,raydiak/rakudo