Disable thread_local for all mobile targets

Summary: Android also has limited support for thread_local so we should not enable it at all as a precaution

Reviewed By: magedm

Differential Revision: D6884145

fbshipit-source-id: f39dd8fd5405ca0bc5be9b3538718a6f58058442

folly/experimental/hazptr/hazptr-impl.h

@@ -30,9 +30,10 @@
 
 #ifndef HAZPTR_TC
 
-// If we are on an IOS device or simulator then do not use thread caching
-// Performance is potentially suboptimal without thread local support
-#if FOLLY_MOBILE && defined(__APPLE__)
+// If we are targeting a mobile device, do not use thread caching as a
+// precaution. Performance is potentially suboptimal without thread
+// local support
+#if FOLLY_MOBILE
 #define HAZPTR_TC false
 #else
 #define HAZPTR_TC true
@@ -44,9 +45,10 @@
 #endif
 
 #ifndef HAZPTR_PRIV
-// If we are on an IOS device or simulator then do not use thread caching
-// Performance is potentially suboptimal without thread local support
-#if FOLLY_MOBILE && defined(__APPLE__)
+// If we are targeting a mobile device, do not use thread caching as a
+// precaution. Performance is potentially suboptimal without thread
+// local support
+#if FOLLY_MOBILE
 #define HAZPTR_PRIV false
 #else
 #define HAZPTR_PRIV true