SAMD51 Linker Script Missing bss start and end defines

Summary:

Versions Tested:

[x] v1
[x] v2

Versions Impacted:

[x] v1
[ ] v2

Details: If compiling without --gc-sections, things need __bss_start__ and __bss_end__ defined in linker script.

Importer should patch samd51 script to add these in bss section.

/* .bss section which is used for uninitialized data */
    .bss (NOLOAD) :
    {
        . = ALIGN(4);
        _sbss = . ;
        _szero = .;
        __bss_start__ = .;
        *(.bss .bss.*)
        *(COMMON)
        . = ALIGN(4);
        _ebss = . ;
        _ezero = .;
        __bss_end__ = .;
    } > ram

MB3hel / AUVControlBoard

SAMD51 Linker Script Missing bss start and end defines #2