Don't run disable_ld_config_file test on non-production devices

The test always fails when run on non-production devices. Silence the
expected failure.

Bug: 64908138
Test: run CtsBionicTestCases on userdebug device. disable_ld_config_file
test does not fail.

Merged-In: Icd24a356dfbc62f540e3263070434a4fd065bfbc
Change-Id: Icd24a356dfbc62f540e3263070434a4fd065bfbc
(cherry picked from commit 157655dc)