Bump graal-dist micros timeout

Author: farquet

compiler/ci_common/benchmark-suites.libsonnet

@@ -311,7 +311,7 @@
     run+: [
       self.benchmark_cmd + ["jmh-dist:GRAAL_COMPILER_MICRO_BENCHMARKS", "--"] + self.extra_vm_args
     ],
-    timelimit: "3:00:00",
+    timelimit: "5:00:00",
     min_jdk_version:: 8,
     max_jdk_version:: null
   },