Fix flakiness.

`sed` does not understand the plus operator without additional flags (which I
don't know whether they are available on all systems that we test on), so we were missing one message we wanted to strip out.

PiperOrigin-RevId: 502809677
Change-Id: If6cd39eb9553e736dd1471ee55b3e4947beb2f5a

src/test/shell/integration/bazel_command_log_test.sh

@@ -39,7 +39,7 @@ function strip_lines_from_bazel_cc() {
     -e '/^\$TEST_TMPDIR defined: output root default is/d' \
     -e '/^OpenJDK 64-Bit Server VM warning: ignoring option UseSeparateVSpacesInYoungGen; support was removed in 8.0/d' \
     -e '/^Starting local B[azel]* server and connecting to it\.\.\.\.*$/d' \
-    -e '/^\.\.\. still trying to connect to local B[azel]* server ([0-9]+) after [1-9][0-9]* seconds \.\.\.\.*$/d' \
+    -e '/^\.\.\. still trying to connect to local B[azel]* server ([1-9][0-9]*) after [1-9][0-9]* seconds \.\.\.\.*$/d' \
     -e '/^Killed non-responsive server process/d' \
     -e '/server needs to be killed, because the startup options are different/d' \
     -e '/^WARNING: Waiting for server process to terminate (waited 5 seconds, waiting at most 60)$/d' \