Fix launcher extbin license name

[mbien]

oops, thanks to @neilcsmith-net for noticing this. Luckily this doesn't seem to affect the release artifact due to the nature of this module.

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[ebarboni]

LGTM

but why was the missing license not detected ?

[neilcsmith-net]

@ebarboni it only showed up with ant verify-all-libs-and-licenses (note all, not ant verify-libs-and-licenses). Also, the license is in there because there's an overlap with the file at https://github.com/apache/netbeans/blob/master/platform/o.n.bootstrap/external/launcher-external-binaries-2-6c17cc6-license.txt and one other. So the reference isn't missing, and it's our license anyway - no release issues with this one.

[neilcsmith-net]

Thanks @mbien