libsodium: update to 1.0.3

Signed-off-by: Shuoyao Wang <wong.syrone@gmail.com>

libs/libsodium/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libsodium
-PKG_VERSION:=1.0.2
+PKG_VERSION:=1.0.3
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://download.libsodium.org/libsodium/releases
-PKG_MD5SUM:=dc40eb23e293448c6fc908757738003f
+PKG_MD5SUM:=b3bcc98e34d3250f55ae196822307fab
 
 PKG_FIXUP:=libtool autoreconf
 PKG_USE_MIPS16:=0