Fix 32-bit issues in tests, and add a trivial test for the FD_* macros.

Change-Id: Ia3f21ce1f0ed9236527fe44d36ccb7de6bf63113
diff --git a/tests/Android.mk b/tests/Android.mk
index e60b908..39c28a4 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -80,6 +80,7 @@
     string_test.cpp \
     strings_test.cpp \
     stubs_test.cpp \
+    sys_select_test.cpp \
     sys_sendfile_test.cpp \
     sys_stat_test.cpp \
     system_properties_test.cpp \