Suppress expansion-to-defined warning

External source file contains code pattern that triggers the compiler
warning.

In file included from packages/apps/Test/connectivity/sl4n/utils/command_receiver.cpp:17:
In file included from packages/apps/Test/connectivity/sl4n/rapidjson/include/rapidjson/document.h:20:
In file included from packages/apps/Test/connectivity/sl4n/rapidjson/include/rapidjson/reader.h:23:
packages/apps/Test/connectivity/sl4n/rapidjson/include/rapidjson/internal/stack.h:39:5: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
 #if RAPIDJSON_HAS_CXX11_RVALUE_REFS
 ^

Test: m checkbuild
Bug: 29823425
Change-Id: I029e9cfeca8a67d9601571d8c39fddb14ff8b2ad
1 file changed
tree: 5132a5c1a074e12bb5bcc2cb7fd39e4642947862
  1. OWNERS
  2. PMC/
  3. PREUPLOAD.cfg
  4. UID/
  5. sl4n/