Fix tool.drcacheoff.rseq test regression
Migrating the AArch64 Jenkins CI to an Ampere Altera machine caused a regression in the tool.drcacheoff.rseq
test:
*** postcmd failed (1): ERROR: Usage error: Unknown option: -test_mode
Migrating the AArch64 Jenkins CI to an Ampere Altera machine caused a regression in the tool.drcacheoff.rseq
test:
*** postcmd failed (1): ERROR: Usage error: Unknown option: -test_mode