build: add $(STAGING_DIR_HOST)/usr/{include, lib} to build search path.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

SVN-Revision: 42987

rules.mk

@@ -187,9 +187,9 @@ export PKG_CONFIG
 
 HOSTCC:=gcc
 HOSTCXX:=g++
-HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include
+HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include -I$(STAGING_DIR_HOST)/usr/include
 HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
-HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib
+HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib -L$(STAGING_DIR_HOST)/usr/lib
 
 TARGET_CC:=$(TARGET_CROSS)gcc
 TARGET_AR:=$(TARGET_CROSS)ar