[PATCH] use autoconf MKDIR_P to reduce usage of legacy mkinstalldirs script

[Rolf Eike Beer]

Basically all platforms have a proper "mkdir -p". Autoconf has install-sh as 
fallback when using AC_PROG_MKDIR_P, which is also hardened against races if 
it is recent enough. Update that script and use MKDIR_P whereever possible.

Greetings,

Eike
-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
Bertha-von-Suttner-Str. 9, 37085 Göttingen, Germany
Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
Geschaeftsfuehrung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055

emlix – smart embedded open source
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