tests: Add 'riscvmatched-fs.py' example to long/nightly tests

This patch adds "configs/example/gem5_library/riscvmatched-fs.py" as a
long/nightly test.

Change-Id: I2a31832d16a149e81e3a68f8a402d3dc86fb1924
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64131
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py b/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
index d8bcf6b..47ec60b 100644
--- a/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
+++ b/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
@@ -307,3 +307,20 @@
     valid_hosts=constants.supported_hosts,
     length=constants.long_tag,
 )
+
+gem5_verify_config(
+    name="test-gem5-library-example-riscvmatched-fs",
+    fixtures=(),
+    verifiers=(),
+    config=joinpath(
+        config.base_dir,
+        "configs",
+        "example",
+        "gem5_library",
+        "riscvmatched-fs.py",
+    ),
+    config_args=[],
+    valid_isas=(constants.riscv_tag,),
+    valid_hosts=constants.supported_hosts,
+    length=constants.long_tag,
+)