[compiler-rt][builtins] Un-xfail two tests on sparcv9

Two tests currently `XPASS` on sparcv9:

  Unexpectedly Passed Tests (2):
    Builtins-sparcv9-sunos :: compiler_rt_logbl_test.c
    Builtins-sparcv9-sunos :: divtc3_test.c

The following patch fixes this.

Tested on `sparcv9-sun-solaris2.11`.

Differential Revision: https://reviews.llvm.org/D85119