AVRO-2898: Build failure without a C++ compiler (again) (#1025)
AVRO-2898: Build failure without a C++ compiler (again) (#1025)

avro-c fails to build (again) without a C++ compiler because commit
664c2fc7fba19709c1f974055f9cf4c8a799e108 reverted the change made by
commit 414a51fdc1856083bb16851f09a4c61a48796132

Fixes:
 - http://autobuild.buildroot.org/results/cfa91db53cf5502cbb6f902d1e7ad6397c8d70fd

Signed-off-by: Fabrice Fontaine <7d88633730b8b85c1516e612893df72eae9cd341@gmail.com>
apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro