Change LOCAL_LDFLAGS to LOCAL_LDLIBS to fix the build on Ubuntu 11.10.

Change-Id: I75825ab1ff0675c9a602ad208701f15f9fab6bdc
diff --git a/Android.mk b/Android.mk
index c1d41d2..3417e69 100644
--- a/Android.mk
+++ b/Android.mk
@@ -122,7 +122,7 @@
 
 LOCAL_MODULE_TAGS := tests
 
-LOCAL_LDFLAGS := \
+LOCAL_LDLIBS := \
   -lpthread \
   -ldl