Disable no-warning-test which is compiled with -Werror option and whose only purpose is checking if compilation results in any warnings.

--- /src/Makefile.am
+++ /src/Makefile.am
@@ -714,7 +714,7 @@
 GOOGLEMOCK_SRC_DIR=$(srcdir)/../third_party/googletest/googlemock
 check_PROGRAMS = protoc protobuf-test protobuf-lazy-descriptor-test \
                  protobuf-lite-test test_plugin protobuf-lite-arena-test \
-                 no-warning-test $(GZCHECKPROGRAMS)
+                 $(GZCHECKPROGRAMS)
 protobuf_test_LDADD = $(PTHREAD_LIBS) libprotobuf.la libprotoc.la \
                       $(GOOGLETEST_BUILD_DIR)/lib/libgtest.la     \
                       $(GOOGLEMOCK_BUILD_DIR)/lib/libgmock.la     \
@@ -901,4 +901,4 @@
 
 TESTS = protobuf-test protobuf-lazy-descriptor-test protobuf-lite-test \
         google/protobuf/compiler/zip_output_unittest.sh $(GZTESTS)     \
-        protobuf-lite-arena-test no-warning-test
+        protobuf-lite-arena-test