Un-XFAIL floating point test in resilient mode

Author: CodaFi

test/stdlib/FloatingPoint.swift.gyb

@@ -3,9 +3,6 @@
 // RUN: %line-directive %t/FloatingPoint.swift -- %target-run %t/a.out
 // REQUIRES: executable_test
 
-// FIXME: https://bugs.swift.org/browse/SR-2808
-// XFAIL: resilient_stdlib
-
 %{
 from gyb_stdlib_unittest_support import TRACE, stackTrace, trace
 }%