Use GTEST_SKIP() rather than GTEST_LOG_() when skipping.

Test: treehugger
Change-Id: I74dca1882c002a51c9758fe7282b10c4413ecb03
diff --git a/tests/setjmp_test.cpp b/tests/setjmp_test.cpp
index 4b1482a..ec1badc 100644
--- a/tests/setjmp_test.cpp
+++ b/tests/setjmp_test.cpp
@@ -321,6 +321,6 @@
   ASSERT_EQ(0, pthread_create(&t, nullptr, interrupter, tids));
   pthread_join(t, nullptr);
 #else
-  GTEST_LOG_(INFO) << "tests uses functions not in glibc";
+  GTEST_SKIP() << "tests uses functions not in glibc";
 #endif
 }