Merge pull request #1886 from jow-/python-build-depend-fix

python: fix two build depend issues

lang/python/Makefile

@@ -28,7 +28,8 @@ HOST_BUILD_PARALLEL:=1
 PKG_BUILD_DIR:=$(BUILD_DIR)/Python-$(PKG_VERSION)
 HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/Python-$(PKG_VERSION)
 
-PKG_BUILD_DEPENDS:=libbz2/host python/host
+PKG_BUILD_DEPENDS:=python/host
+HOST_BUILD_DEPENDS:=bzip2/host
 
 include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/package.mk