Contrib: do not build Jaeger example apps.
diff --git a/contrib/src/jaeger-client-cpp/Makefile b/contrib/src/jaeger-client-cpp/Makefile
index 1b4dd4e..6efd179 100644
--- a/contrib/src/jaeger-client-cpp/Makefile
+++ b/contrib/src/jaeger-client-cpp/Makefile
@@ -30,6 +30,7 @@
OpenTracing_DIR=$(PREFIX)/usr/local/lib/cmake/OpenTracing \
thrift_DIR=$(PREFIX)/usr/local/lib/cmake/thrift \
$(CMAKE) \
+ -DJAEGERTRACING_BUILD_EXAMPLES=OFF \
-DBUILD_TESTING=OFF \
-DJAEGERTRACING_PLUGIN=ON \
-DCMAKE_BUILD_TYPE=Release \