Stopped the remaining example scripts naming archives that were deleted (#620)

#618 fixed the arm9 and arm11 shell scripts, but not their .bat counterparts,
and did not look at cortex_r4 and cortex_r5 at all. An audit of every build
script against the files actually present in its directory found the rest.

The .bat scripts for arm9, arm11, cortex_r4 and cortex_r5 still linked libc.a,
libgcc.a and, for arm11, libnosys.a from their own example_build directories,
and the cortex_r4 and cortex_r5 shell scripts did too. Those archives went in
6.1.10 under "Removal of unneeded files", so on Windows all four examples failed
exactly as the shell versions did before #618, and on Linux the two R-profile
ones still did.

Link through the compiler driver, as the other examples have since #594.

This does not make the examples link, and the change stops there deliberately.
All four now fail the same way,

    undefined reference to `_fini'

because their linker scripts define the .init and .fini sections but not the
_init and _fini symbols, which live in crti.o and crtn.o and are omitted by
-nostartfiles. Reviving four very old cores is separate work.

Correct the comment on EXAMPLES_EXPECTED_TO_FAIL again. It had cortex_r4 and
cortex_r5 failing for want of newlib multilib variants; they do not. All four
share the single cause above, and the multilib explanation was wrong for the
R-profile pair just as it was for arm9 and arm11.

Verified by running each shell script: cortex_r4 and cortex_r5 fail on _fini
rather than on missing files, matching arm9 and arm11. The .bat changes mirror
link lines proven that way in the same directories; they cannot be run here.

Three scripts are left alone and reported instead, because a blind edit could not
be verified: ports_module/cortex_m3 and cortex_m4 have Windows-only .bat scripts
that also name sources which are absent or differ in case, and
ports_smp/mips32_interaptiv_smp needs a MIPS toolchain.

Assisted-by: Claude Code (Opus 5) <[email protected]>

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