[LD, ARM] Fix in STM32L4XX patch

[Nick Clifton]

Hi Christophe,

> The attached small patch fixes that by forcing %ld and casting the
> value to (long), as it seems to be standard practice elsewhere in the
> binutils, although not very clean.

Thanks - I have now applied the patch.  (Sorry about the delay in 
responding).

> Nick, don't you see this error?

Strangely no.  I do build a 32-bit only version of the toolchain, but 
the problem did not show up.  Strange.

Cheers
   Nick