[OE-core] [PATCH] package.bbclass: Let pn be eglibc for eglibc-locale

[Khem Raj]

>
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> After RPs fix and Paul's root file system rework I am still seeing
>
> temp/run.do_rootfs.25593: 932: local: locale-base-en-gb: bad variable name
>

OK I think my fault is that I am dash'ing and not bash'ing and
meta/classes/package_rpm.bbclass is full of bashism