tests, scons: Fix Testlib test failures

This commit changes the fs/linux/arm and learning_gem5 tests as
they were previously failing with the Ruby change. The
fs/linux/arm long tests require the addition of a new gem5 build,
ARM_X86, which builds the ARM and X86 ISAs with the
MESI_Two_Level cache hierarchy.

tests/gem5/fs/linux/arm/test.py

@@ -169,7 +169,7 @@ for name in arm_fs_long_tests:
         verifiers=verifier_list(name),  # TODO: Add basic stat verifiers
         config=joinpath(filepath, "run.py"),
         config_args=args,
-        valid_isas=(constants.all_compiled_tag,),
+        valid_isas=(constants.arm_x86_tag,),
         length=constants.long_tag,
         fixtures=(arm_fs_binaries,),
         uses_kvm=name in arm_fs_kvm_tests,

tests/gem5/learning_gem5/part3_test.py

@@ -38,7 +38,6 @@ gem5_verify_config(
     verifiers=(verifier.MatchStdoutNoPerf(joinpath(ref_path, "threads")),),
     config=joinpath(config_path, "simple_ruby.py"),
     config_args=[],
-    protocol="MSI",
     # Currently only x86 has the threads test
     valid_isas=(constants.all_compiled_tag,),
     # dynamically linked
@@ -51,7 +50,6 @@ gem5_verify_config(
     verifiers=(verifier.MatchStdout(joinpath(ref_path, "test")),),
     config=joinpath(config_path, "ruby_test.py"),
     config_args=[],
-    protocol="MSI",
     # Currently only x86 has the threads test
     valid_isas=(constants.all_compiled_tag,),
     length=constants.long_tag,