disable containerSize tests for iOS platforms temporarily

Summary:
Certain toolchains on iOS platforms don't apply EBO to F14 BasePolicy and
F14Table, which makes the size calculations incorrect.

This diff disables the test pending further investigation (T33121191).

Reviewed By: nbronson

Differential Revision: D9467473

fbshipit-source-id: 50435b3fcdeb81a6a892e280fdc919486f0ed107

folly/container/test/F14SetTest.cpp

@@ -483,6 +483,8 @@ TEST(F14FastSet, simple) {
 }
 
 TEST(F14Set, ContainerSize) {
+// TODO(T33121191): pending investigation on EBO applicability on ios platforms.
+#if !FOLLY_MOBILE || !__APPLE__
   {
     folly::F14ValueSet<int> set;
     set.insert(10);
@@ -513,6 +515,7 @@ TEST(F14Set, ContainerSize) {
     EXPECT_EQ(sizeof(set), 8 + 2 * sizeof(void*));
     EXPECT_EQ(set.getAllocatedMemorySize(), 32);
   }
+#endif
 }
 
 TEST(F14VectorMap, reverse_iterator) {