Clean up some test makefiles.

Needed for building with libc++ as the default STL.

Bug: 15193147
Change-Id: I8b462bd288fbea7e0ab182f85ffcbf438afb6aa4
diff --git a/libutils/tests/Android.mk b/libutils/tests/Android.mk
index ab03d87..634f44f 100644
--- a/libutils/tests/Android.mk
+++ b/libutils/tests/Android.mk
@@ -1,8 +1,28 @@
+#
+# Copyright (C) 2014 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Build the unit tests.
 LOCAL_PATH := $(call my-dir)
 
-# Build the unit tests.
-test_src_files := \
+include $(CLEAR_VARS)
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE := libutils_tests
+
+LOCAL_SRC_FILES := \
     BasicHashtable_test.cpp \
     BlobCache_test.cpp \
     BitSet_test.cpp \
@@ -10,19 +30,12 @@
     LruCache_test.cpp \
     String8_test.cpp \
     Unicode_test.cpp \
-    Vector_test.cpp
+    Vector_test.cpp \
 
-shared_libraries := \
+LOCAL_SHARED_LIBRARIES := \
     libz \
     liblog \
     libcutils \
     libutils \
 
-$(foreach file,$(test_src_files), \
-    $(eval include $(CLEAR_VARS)) \
-    $(eval LOCAL_SHARED_LIBRARIES := $(shared_libraries)) \
-    $(eval LOCAL_STATIC_LIBRARIES := $(static_libraries)) \
-    $(eval LOCAL_SRC_FILES := $(file)) \
-    $(eval LOCAL_MODULE := $(notdir $(file:%.cpp=%))) \
-    $(eval include $(BUILD_NATIVE_TEST)) \
-)
+include $(BUILD_NATIVE_TEST)