stop building/testing old x86 validator.

tests/fixedfeaturecpu/nacl.scons

Index: tests/fixedfeaturecpu/nacl.scons
diff --git a/tests/fixedfeaturecpu/nacl.scons b/tests/fixedfeaturecpu/nacl.scons
index fbe82b962146bf7612c223a3be05880150993ad7..2b2808611229e42a6c83ba12b9e277964dfdb2d9 100644
--- a/tests/fixedfeaturecpu/nacl.scons
+++ b/tests/fixedfeaturecpu/nacl.scons
@@ -37,7 +37,6 @@ is_validation_broken = env.IsRunningUnderValgrind()
 # problems.
 if env.Bit('tests_use_irt'):
   if (env.Bit('target_x86_64') and
-      env.Bit('validator_ragel') and
       not env.Bit('nacl_glibc')):
     # R-DFA ignores LM bit and assumes it's always enabled
     expect_null_Z_status=0
@@ -45,7 +44,6 @@ if env.Bit('tests_use_irt'):
   else:
     # 32-bit irt newlib: requeres MMX(prefetchnta),CLFLUSH/FXSR(sfence)
     # 64-bit irt newlib: requires LM(cltq),MMX(prefetchnta),CLFLUSH/FXSR(sfence)
-    # prefetchnta and sfence are classified incorrectly in the old validator
     expect_null_Z_status=1
     expect_sse_Z_status=1
   expect_x87_Z_status=1
@@ -67,15 +65,9 @@ else:
     expect_sse_Z_status=1
     expect_x87_Z_status=1
   elif env.Bit('target_x86_64'):
-    if env.Bit('validator_ragel'):
-      # R-DFA ignores LM bit and assumes it's always enabled
-      expect_null_Z_status=0
-      expect_sse_Z_status=0
-    else:
-      # 64-bit newlib: requires LM(cltq), MMX(prefetchnta), CLFLUSH/FXSR(sfence)
-      # prefetchnta and sfence are classified incorrectly in the old validator
-      expect_null_Z_status=1
-      expect_sse_Z_status=1
+    # R-DFA ignores LM bit and assumes it's always enabled
+    expect_null_Z_status=0
+    expect_sse_Z_status=0
     expect_x87_Z_status=1
 
 test_suites = ['small_tests', 'sel_ldr_tests', 'validator_tests']