Exclude bionic private headers from include path

(cherry picked from commit 9516139c03e7e48b2c23a5b53dc4309989e54c6b)

Change-Id: I2883e2a13a523e6938c8a3aed93e66af948cdcd8
diff --git a/libutils/Android.mk b/libutils/Android.mk
index 4f47d6f..b1dc1f8 100644
--- a/libutils/Android.mk
+++ b/libutils/Android.mk
@@ -91,7 +91,7 @@
 LOCAL_CFLAGS += -Werror
 
 LOCAL_C_INCLUDES += \
-		bionic/libc/private \
+		bionic/libc \
 		external/zlib
 
 LOCAL_STATIC_LIBRARIES := \