Disable RunAllocate test case for turbofan unsupported platform.

  "RunAllocate" test case is added in d6945db7. it invokes Linkage::GetStubCallDescriptor
   which is unimplemented for turbofan unsupported platform.

BUG=

Review URL: https://codereview.chromium.org/1129483003

Cr-Commit-Position: refs/heads/master@{#28244}

test/cctest/compiler/test-simplified-lowering.cc

@@ -661,7 +661,7 @@ TEST(RunAccessTests_Smi) {
   RunAccessTest<Smi*>(kMachAnyTagged, data, arraysize(data));
 }
 
-
+#if V8_TURBOFAN_TARGET
 TEST(RunAllocate) {
   PretenureFlag flag[] = {NOT_TENURED, TENURED};
 
@@ -685,7 +685,7 @@ TEST(RunAllocate) {
     }
   }
 }
-
+#endif
 
 // Fills in most of the nodes of the graph in order to make tests shorter.
 class TestingGraph : public HandleAndZoneScope, public GraphAndBuilders {