buildroot

ntfs-3g: add patch to fix musl build issue

This commit adds a simple patch that fixes the build with the musl C
library. The fix was suggested by Khem Raj (thanks!).

Fixes:

  http://autobuild.buildroot.net/results/eb6dabccf729f96a4e06a98526eb4c716fa6bcd2/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>