[M] Change in coreboot[main]: util/crossgcc: Add libstdcxx target

[Jon Murphy (Code Review)]

Attention is currently required from: Felix Singer, Karthik Ramasubramanian, Martin L Roth, Raul Rangel.

Jon Murphy has posted comments on this change by Jon Murphy. ( https://review.coreboot.org/c/coreboot/+/85275?usp=email )

Change subject: util/crossgcc: Add libstdcxx target
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Patch Set 11:

(3 comments)

File util/crossgcc/buildgcc:

https://review.coreboot.org/c/coreboot/+/85275/comment/6298449f_d4adf191?usp... :
PS11, Line 841: ${EXTRA_ARGS}
> Can we drop the EXTRA_ARGS and just pass `$@` here?

Done

https://review.coreboot.org/c/coreboot/+/85275/comment/361261d7_c91f4660?usp... :
PS11, Line 845: set -- ""
              : 	EXTRA_ARGS="$@"
> Doesn't this set `EXTRA_ARGS=""`?

Yes, was trying to keep the style aligned between functions

https://review.coreboot.org/c/coreboot/+/85275/comment/ff7b0c5a_95a579b1?usp... :
PS11, Line 867: 	set -- "--with-gxx-include-dir="${LIBSTDCXX_INCLUDE_PATH}/coreboot-${TARGETARCH}/include/"
              : 			--with-sysroot="${LIBSTDCXX_INCLUDE_PATH}/""
              : 	EXTRA_ARGS="$@"
              : 	configure_GCC "${EXTRA_ARGS}"
>

Done