pull in updates for 'FATFileSystem -Fixed API integer widths', synchronize with https://github.com/ARMmbed/mbed-os/commit/bee1c953f03a0e4f6a4c397e97409076516614a4#diff-79708982e17fde53fd51da54fda17b32

Dependencies:   FATFileSystem

Fork of SDFileSystem by Mbed

Revision:
4:3f40cbfe801c
Parent:
3:7b35d1709458
Child:
5:8a6740f6c555
--- a/FATFileSystem.lib	Mon Mar 17 14:34:01 2014 +0000
+++ b/FATFileSystem.lib	Wed Aug 24 02:51:06 2016 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/FATFileSystem/#e960e2b81a3c
+https://developer.mbed.org/teams/mbed-official/code/FATFileSystem/#073c375847a5