Fix absl_symbolize_test on ppc64le

[miladfarca]

Test is currently failing with this error:

abseil-cpp/absl/debugging/symbolize_test.cc:264: Failure
Expected: (stack_consumed) < (GetStackConsumptionUpperLimit()), actual: 2076 vs 2048

abseil-cpp/absl/debugging/symbolize_test.cc:272: Failure
Expected: (stack_consumed) < (GetStackConsumptionUpperLimit()), actual: 2076 vs 2048

[  FAILED  ] Symbolize.SymbolizeStackConsumption (0 ms)
[ RUN      ] Symbolize.SymbolizeWithDemanglingStackConsumption
abseil-cpp/absl/debugging/symbolize_test.cc:284: Failure
Expected: (stack_consumed) < (GetStackConsumptionUpperLimit()), actual: 2076 vs 2048

ppc64le ELFv2 minimum stack frame is 32 bytes which causes the cumulative stack_consumed to be larger than other platforms. This PR raises the maximum value globally to fix the issue.

[miladfarca]

/cc @derekmauro