bug report: symbols in linker script to denote addresses result in warnings about relocations

[georglauterbach]

During linking of a binary with a custom linker script that includes symbols to denote the current address (via some_symbol = .;), the following issue can be observed:

ld.lld: warning: could not determine size of cap reloc against <unknown kind> (in GOT) some_symbol
>>> defined in <internal>
>>> referenced by <internal>:(.got+0x[SOME OFFSET])

some_symbol is also a symbol in C declared as extern char some_symbol[];.

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ref: https://cheri-cpu.slack.com/archives/C03JCGFPPU1/p1686852560725089 & https://cheri-cpu.slack.com/archives/C03JCGFPPU1/p1686920378781959