Testsuite failures with flambda enabled

[Sudha247]

The following testsuite failures were observed with flambda enabled, on b23a416:

List of failed tests:
    tests/backtrace/'backtrace_dynlink.ml' with 1.1.1.3.1.1 (check-program-output) 
    tests/basic-modules/'anonymous.ml' with 2.1.2.1 (check-ocamlc.byte-output) 
    tests/weak-ephe-final/'finaliser2.ml' with 1 (native) 
    tests/weak-ephe-final/'ephetest5.ml' with 1 (native) 
    tests/weak-ephe-final/'ephetest4.ml' with 1 (native) 
    tests/promotion/'bigrecmod.ml' with 1 (native) 
    tests/flambda/'afl_lazy.ml' with 1.1 (native) 
    tests/backtrace/'lazy.ml' with 1 (native) 

Full log is here: https://gist.github.com/f867a6d7fc46fdc1caffefbd038dd1b1