[source] tools/scons: update to 2.5.1

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/a6e790b20253aa53f9a82a3331cc59fe40ff7ff7

commit a6e790b20253aa53f9a82a3331cc59fe40ff7ff7
Author: Hannu Nyman <hannu.nyman at iki.fi>
AuthorDate: Fri Nov 25 16:07:11 2016 +0200

    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 at iki.fi>
---
 tools/scons/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/scons/Makefile b/tools/scons/Makefile
index 6d0d84d..ae94713 100644
--- a/tools/scons/Makefile
+++ b/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