Adds quick_exit(3) and at_quick_exit(3) from freebsd

Change-Id: I4fe88abd8f7b8aa45e58aeb2529d59a8d555d338
diff --git a/tests/Android.mk b/tests/Android.mk
index 94474ff..fccf3f1 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -40,6 +40,9 @@
 
 test_cflags += -D__STDC_LIMIT_MACROS  # For glibc.
 
+test_cppflags = \
+    -std=gnu++11 \
+
 libBionicStandardTests_src_files := \
     buffer_tests.cpp \
     ctype_test.cpp \
@@ -91,6 +94,9 @@
 libBionicStandardTests_cflags := \
     $(test_cflags) \
 
+libBionicStandardTests_cppflags := \
+    $(test_cppflags) \
+
 libBionicStandardTests_ldlibs_host := \
     -lrt \