Add functions in sysinfo.h.

Bug: 17703902

Change-Id: I699d12d76a8fc483c919be730c2ac63641b71a1d
diff --git a/tests/Android.mk b/tests/Android.mk
index 14a5e83..967ddbd 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -98,6 +98,7 @@
     sys_stat_test.cpp \
     sys_statvfs_test.cpp \
     sys_syscall_test.cpp \
+    sys_sysinfo_test.cpp \
     sys_time_test.cpp \
     sys_types_test.cpp \
     sys_vfs_test.cpp \