tools/scons: update to 2.5.1

RELEASE 2.5.1 - Mon, 03 Nov 2016 13:37:42 -0400
    - Add scons-configure-cache.py to packaging. It was omitted
    - Use memoization to optimize PATH evaluation across
      all dependencies per node.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

tools/scons/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=scons
-PKG_VERSION:=2.5.0
+PKG_VERSION:=2.5.1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SF/scons \
 		http://fossies.org/linux/misc/
-PKG_MD5SUM:=9e00fa0df8f5ca5c5f5975b40e0ed354
+PKG_MD5SUM:=aaaf09e1351a598f98d17b0cf1103e7a
 
 include $(INCLUDE_DIR)/host-build.mk