[simd] Disable Simd Scalar lowering for x64, enable tests for all other architectures.

test/cctest/cctest.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 194 matching lines @@
       'trace-extension.h',
       'types-fuzz.h',
       'wasm/test-managed.cc',
       'wasm/test-run-wasm.cc',
       'wasm/test-run-wasm-64.cc',
       'wasm/test-run-wasm-asmjs.cc',
       'wasm/test-run-wasm-interpreter.cc',
       'wasm/test-run-wasm-js.cc',
       'wasm/test-run-wasm-module.cc',
       'wasm/test-run-wasm-relocation.cc',
+      'wasm/test-run-wasm-simd-lowering.cc',
       'wasm/test-wasm-stack.cc',
       'wasm/test-wasm-trap-position.cc',
       'wasm/wasm-run-utils.h',
     ],
     'cctest_sources_ia32': [  ### gcmole(arch:ia32) ###
       'test-assembler-ia32.cc',
       'test-code-stubs.cc',
       'test-code-stubs.h',
       'test-code-stubs-ia32.cc',
       'test-disasm-ia32.cc',
       'test-macro-assembler-ia32.cc',
       'test-log-stack-tracer.cc',
       'test-run-wasm-relocation-ia32.cc'
     ],
     'cctest_sources_x64': [  ### gcmole(arch:x64) ###
       'test-assembler-x64.cc',
       'test-code-stubs.cc',
       'test-code-stubs.h',
       'test-code-stubs-x64.cc',
       'test-disasm-x64.cc',
       'test-macro-assembler-x64.cc',
       'test-log-stack-tracer.cc',
       'test-run-wasm-relocation-x64.cc',
       'wasm/test-run-wasm-simd.cc',
-      'wasm/test-run-wasm-simd-lowering.cc',
     ],
     'cctest_sources_arm': [  ### gcmole(arch:arm) ###
       'test-assembler-arm.cc',
       'test-code-stubs.cc',
       'test-code-stubs.h',
       'test-code-stubs-arm.cc',
       'test-disasm-arm.cc',
       'test-macro-assembler-arm.cc',
       'test-run-wasm-relocation-arm.cc'
     ],
@@ skipping 266 matching lines @@
             '../../gypfiles/isolate.gypi',
           ],
           'sources': [
             'cctest.isolate',
           ],
         },
       ],
     }],
   ],
 }