Ondřej Surý 9cf1468b77 Update libtool files to 2.4.6 ...

(cherry picked from commit fe06778be7)

2018-04-06 12:36:39 +10:00

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libtool.m4

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lt~obsolete.m4

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ltoptions.m4

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ltsugar.m4

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ltversion.m4

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