bpftrace: Do not strip uprobe_test

[wentao-windriver]

"runtime:regression" in ptest gets the following FAILED: | nm: ./testprogs/uprobe_test: no symbols Keep the debug info of uprobe_test to pass this ptest item.

the steps to repruduce: $export BPFTRACE_RUNTIME_TEST_EXECUTABLE=/usr/bin $cd /usr/lib/bpftrace/ptest/tests $python3 runtime/engine/main.py --filter="regression.*" *** | [ FAILED ] regression.address_probe_invalid_expansion | Command: /usr/bin/bpftrace -e "uprobe:./testprogs/uprobe_test:0x$ | (nm ./testprogs/uprobe_test | awk '$3 == "function1" | {print $1}') { @[probe] = count(); exit() }" | Unclean exit code: 1 | Output: nm: ./testprogs/uprobe_test: no symbols\nNo probes to attach\n

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