ASSERT finding vsyscall page on Fedora 27

Every 32-bit app on Fedora 27 is failing with: http://dynamorio.org/CDash/testDetails.php?test=517745&build=35313

<Application /work/dr/nightly/run/build_debug-internal-32/suite/tests/bin/common.broadfun spaces (688).  Internal Error: DynamoRIO debug check failure: /work/dr/nightly/src/core/arch/arch.c:3064 vsyscall_page_start != NULL && vsyscall_page_start == (app_pc) PAGE_START(instr_get_raw_bits(instr))