Remove unnecessary manual include path entries.

We pick up elfutils and libunwind headers for free by linking the libraries.

Change-Id: Icd5006766ac9dc8a208a22f762865ee60f82a455
diff --git a/Android.mk b/Android.mk
index 580da60..b5857d8 100644
--- a/Android.mk
+++ b/Android.mk
@@ -63,9 +63,6 @@
     $(LOCAL_PATH)/ \
     $(LOCAL_PATH)/sysdeps/ \
     $(LOCAL_PATH)/sysdeps/linux-gnu \
-    external/elfutils \
-    external/elfutils/0.153/libelf \
-    external/libunwind/include \
 
 arm_path := sysdeps/linux-gnu/arm
 LOCAL_C_INCLUDES_arm := $(LOCAL_PATH)/$(arm_path)