have illumos-gate build sun-solaris with perl 534

[timmooney]

This changes components/openindiana/illumos-gate so that instead of generating runtime/perl-522/module/sun-solaris, it generates runtime/perl-534/module/sun-solaris.

There are a lot of relevant comments from Alexander in PR #7640 that relate to this update. The diff in 7640 should not be merged. I'll close that PR.

Note that I've rebuilt illumos-gate many times in the past couple weeks. I seem to get unpredictable behavior with illumos-gate. It has built and successfully "installed' (the entire gmake build process completes successfully) a couple of times, but most of the time everything builds successfully, but I get failures from the "install":

==== Build errors (non-DEBUG) ====

dmake: Warning: Target `install' not remade because of errors
The following command caused the error:
dmake: Warning: Don't know how to make target `/export/home/mooney/oi-userland/components/openindiana/illumos-gate/illumos-gate/proto/root_i386/opt/os-tests/tests/cores'
dmake: Warning: Target `install' not remade because of errors
The following command caused the error:
dmake: Warning: Target `install' not remade because of errors
dmake: Warning: Command failed for target `libdumper'
dmake: Warning: Target `install' not remade because of errors
The following command caused the error:
dmake: Warning: Target `install' not remade because of errors
dmake: Warning: Command failed for target `tests'
dmake: Warning: Target `install' not remade because of errors
dmake: Warning: Command failed for target `os-tests'
dmake: Warning: Target `install' not remade because of errors
The following command caused the error:
dmake: Warning: Target `install' not remade because of errors

I don't know if these relate to the chicken-or-egg problem that Alexander mentioned, but they seem unrelated to the perl changes I made.

Note that in addition to building runtime/perl-534/module/sun-solaris, I've also tested changing the perl and system-perl mediator to point to the 534 perl, and all of illumos-gate builds OK when using perl-534.

As I said in my question on oi-dev, I don't know where this should fit into the overall process of updating perl, but I wanted to get the PR in place so that other eyes can check it out and hopefully have some suggestions about where this should fit in the overall process.

[stale]

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