[S] Change in coreboot[master]: util/xcompile: Add --no-warn-rwx-segments to arm64 LD params

[Nico Huber (Code Review)]

Attention is currently required from: Felix Singer, Martin L Roth.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/67820 )

Change subject: util/xcompile: Add --no-warn-rwx-segments to arm64 LD params
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Patch Set 2:

(2 comments)

File util/xcompile/xcompile:

https://review.coreboot.org/c/coreboot/+/67820/comment/a93e368e_35a7d498 
PS2, Line 312: ifneq ($(shell "${LD_${TARCH}}" --no-warn-rwx-segments --version >/dev/null 2>&1),)
Why run this in make and not in xcompile already? cf. line 203 for
`${LDFLAGS_ARM64_A53_ERRATUM_843419}`. In case of this change,
it should be a little simpler, because there is no Kconfig to check.

This whole function (report_arch_toolchain()) is hard to parse. I guess
there are more if's than necessary, e.g. when the ERRATUM variable is empty,
we don't need to guard it (line 304)?

https://review.coreboot.org/c/coreboot/+/67820/comment/d2d5b100_32acfe0e 
PS2, Line 313: 	LD_${TARCH}+=" --no-warn-rwx-segments"
In make, there shouldn't be quotes. Make would put them literally into
the variable.