Revert "Create libbase."

Breaks internal master.

This reverts commit 98ff77204cef9bb8f0f27420833233622060a09e.

Change-Id: I18dc6021cb43efff8aa88486c2d980dc2b8eedba
diff --git a/libutils/tests/Android.mk b/libutils/tests/Android.mk
index 634f44f..ce288ca 100644
--- a/libutils/tests/Android.mk
+++ b/libutils/tests/Android.mk
@@ -26,9 +26,11 @@
     BasicHashtable_test.cpp \
     BlobCache_test.cpp \
     BitSet_test.cpp \
+    file_test.cpp \
     Looper_test.cpp \
     LruCache_test.cpp \
     String8_test.cpp \
+    stringprintf_test.cpp \
     Unicode_test.cpp \
     Vector_test.cpp \