configure.ac doesn’t check for the version of Perl at all
so you can’t suppose that it is guaranteed to be 5.12 or beyond

before this patch
in the case you use perl < 5.12 at build time
you would get
    Can't locate object method "newdir" via package "File::Temp"
    at solenv/bin/packimages.pl

the commit 4e3dc8c1
introduced such incompatibility

Change-Id: Icd9281e0065ed67d69d07ac921b054deed052764
Reviewed-on: https://gerrit.libreoffice.org/29907Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>