python: revert $(STAGING_DIR)/host to $(STAGING_DIR)/host change

Also, override all prefix args in the HOST_CONFIGURE_ARGS
so that this works fine on CC/15.05.
There are some changes in core regarding package builds that
require this.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/Makefile

@@ -12,7 +12,7 @@ include ./files/python-package.mk
 
 PKG_NAME:=python
 PKG_VERSION:=$(PYTHON_VERSION).$(PYTHON_VERSION_MICRO)
-PKG_RELEASE:=7
+PKG_RELEASE:=8
 
 PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://www.python.org/ftp/python/$(PKG_VERSION)
@@ -144,13 +144,13 @@ define Build/InstallDev
 		$(PKG_INSTALL_DIR)/usr/include/python$(PYTHON_VERSION) \
 		$(1)/usr/include/
 	$(CP) \
-		$(STAGING_DIR_HOST)/lib/python$(PYTHON_VERSION) \
+		$(STAGING_DIR)/host/lib/python$(PYTHON_VERSION) \
 		$(PKG_INSTALL_DIR)/usr/lib/libpython$(PYTHON_VERSION).so* \
 		$(1)/usr/lib/
 	$(CP) \
-		$(STAGING_DIR_HOST)/lib/pkgconfig/python.pc \
-		$(STAGING_DIR_HOST)/lib/pkgconfig/python2.pc \
-		$(STAGING_DIR_HOST)/lib/pkgconfig/python-$(PYTHON_VERSION).pc \
+		$(STAGING_DIR)/host/lib/pkgconfig/python.pc \
+		$(STAGING_DIR)/host/lib/pkgconfig/python2.pc \
+		$(STAGING_DIR)/host/lib/pkgconfig/python-$(PYTHON_VERSION).pc \
 		$(1)/usr/lib/pkgconfig
 	$(CP) \
 		$(PKG_INSTALL_DIR)/usr/lib/python$(PYTHON_VERSION)/config \
@@ -221,16 +221,21 @@ HOST_CONFIGURE_ARGS+= \
 	--without-cxx-main \
 	--without-pymalloc \
 	--with-threads \
-	--with-system-expat="$(STAGING_DIR_HOST)" \
-	--with-system-ffi="$(STAGING_DIR_HOST)" \
+	--prefix=$(STAGING_DIR)/host \
+	--exec-prefix=$(STAGING_DIR)/host \
+	--sysconfdir=$(STAGING_DIR_HOST)/host/etc \
+	--localstatedir=$(STAGING_DIR)/host/var \
+	--sbindir=$(STAGING_DIR)/host/bin \
+	--with-system-expat=$(STAGING_DIR)/host \
+	--with-system-ffi=$(STAGING_DIR)/host \
 	--with-ensurepip=upgrade \
 	CONFIG_SITE= \
 	CFLAGS="$(HOST_CFLAGS)"
 
 define Host/Install
-	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin/
+	$(INSTALL_DIR) $(STAGING_DIR)/host/bin/
 	$(MAKE) -C $(HOST_BUILD_DIR) install
-	$(INSTALL_BIN) $(HOST_BUILD_DIR)/Parser/pgen $(STAGING_DIR_HOST)/bin/pgen2
+	$(INSTALL_BIN) $(HOST_BUILD_DIR)/Parser/pgen $(STAGING_DIR)/host/bin/pgen2
 endef
 
 $(eval $(call HostBuild))

lang/python/files/python-host.mk

@@ -1,11 +1,11 @@
 #
-# Copyright (C) 2016-2016 OpenWrt.org
+# Copyright (C) 2015-2016 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
 #
 
-HOST_PYTHON_DIR:=$(STAGING_DIR_HOST)
+HOST_PYTHON_DIR:=$(STAGING_DIR)/host
 HOST_PYTHON_INC_DIR:=$(HOST_PYTHON_DIR)/include/python$(PYTHON_VERSION)
 HOST_PYTHON_LIB_DIR:=$(HOST_PYTHON_DIR)/lib/python$(PYTHON_VERSION)
 
@@ -13,7 +13,7 @@ HOST_PYTHON_PKG_DIR:=/lib/python$(PYTHON_VERSION)/site-packages
 
 HOST_PYTHON_BIN:=$(HOST_PYTHON_DIR)/bin/python$(PYTHON_VERSION)
 
-HOST_PYTHONPATH:=$(HOST_PYTHON_LIB_DIR):$(STAGING_DIR_HOST)/$(HOST_PYTHON_PKG_DIR)
+HOST_PYTHONPATH:=$(HOST_PYTHON_LIB_DIR):$(STAGING_DIR)/host/$(HOST_PYTHON_PKG_DIR)
 
 define HostPython
 	if [ "$(strip $(3))" == "HOST" ]; then \
@@ -44,7 +44,7 @@ define Build/Compile/HostPyMod
 		LDSHARED="$(HOSTCC) -shared" \
 		CFLAGS="$(HOST_CFLAGS)" \
 		CPPFLAGS="$(HOST_CPPFLAGS) -I$(HOST_PYTHON_INC_DIR)" \
-		LDFLAGS="$(HOST_LDFLAGS) -lpython$(PYTHON_VERSION) -Wl$(comma)-rpath=$(STAGING_DIR_HOST)/lib" \
+		LDFLAGS="$(HOST_LDFLAGS) -lpython$(PYTHON_VERSION) -Wl$(comma)-rpath=$(STAGING_DIR)/host/lib" \
 		_PYTHON_HOST_PLATFORM=linux2 \
 		$(3) \
 		, \