[libc++] Fix SPEC globbing pattern

Author: ldionne

libcxx/test/benchmarks/spec.gen.py

@@ -74,5 +74,5 @@
 
     # Parse the results into a LNT-compatible format. This also errors out if there are no CSV files, which
     # means that the benchmark didn't run properly (the `runcpu` command above never reports a failure).
-    print(f'RUN: %{{libcxx-dir}}/utils/parse-spec-results %T/result/CPUv8.001.*.train.csv --output-format=lnt > %T/results.lnt')
+    print(f'RUN: %{{libcxx-dir}}/utils/parse-spec-results %T/result/*.train.csv --output-format=lnt > %T/results.lnt')
     print(f'RUN: cat %T/results.lnt')