Move up to C++14.

The default standard version is now ahead of us. Stop specifying C++11
so we get that too.

Change-Id: Ic96942cd7fd134118e29b744601b0119e49b6ac4
diff --git a/tests/Android.mk b/tests/Android.mk
index fc47e80..205ccc5 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -46,8 +46,7 @@
 test_cflags += -DUSE_JEMALLOC
 endif
 
-test_cppflags = \
-    -std=gnu++11 \
+test_cppflags := \
 
 libBionicStandardTests_src_files := \
     arpa_inet_test.cpp \