let-me-create: fix build with musl

Add a patch to fix build with musl C library.

Fixes:
  http://autobuild.buildroot.net/results/af946fa6fe05ee265e4ac97742b15afeb0cea1ab



Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>