mtools: update to version 4.0.39

Improvements since the 4.0.38 release are:
 - Rename strtoi to strosi (string to signed int). The strtoi
   function on BSD does something else (returns an intmax, not
   an int)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

tools/mtools/Makefile

@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mtools
-PKG_VERSION:=4.0.38
+PKG_VERSION:=4.0.39
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=@GNU/$(PKG_NAME)
-PKG_HASH:=7b94485f486e7df08cca68b00a164a13cd38f4c63cb8684d188759ee7bc5e729
+PKG_HASH:=397f1e2b7b7a2a270eb7970fa363e445f956926ec51e8170c3869da85b0987bd
 
 HOST_BUILD_PARALLEL:=1