Fix Catena 4801 link "warning: changing start of section .bss by 4 bytes"

[terrillmoore]

You sometime get warnings at linktime, like: warning: changing start of section .bss by 4 bytes.

This is an error in the variant ldscript.ld. (This probably should be moved to be common for all variants, as the Murata module is constant, but .. different issue.)

I patched my local version from:

Arduino_Core_STM32/variants/CATENA_4801/ldscript.ld

Lines 149 to 153 in 6fba842

	/* Uninitialized data section */
	. = ALIGN(4);
	.bss :
	{
	/* This is used by the startup in order to initialize the .bss secion */

to:

/* Uninitialized data section */ 
. = ALIGN(4)
.bss ALIGN(4):
  {
    . = ALIGN(4);
    /* This is used by the startup in order to initialize the .bss secion */ 

And the warning goes away, at least when compiling the model 4811 firmware at commit a32357be6d76307c2a6042147ddf5b1c469492bd.