Bug#901381: FTBFS: depend on debhelper >= 9.20160114 for --dbgsym-migration

[pmoulder]

Source: cairo
Version: 1.14.8-1
Severity: normal

Dear Maintainer,

Building cairo_1.14.8-1 failed for me, giving

  Unknown option: dbgsym-migration
  dh_strip: unknown option; aborting

on stderr (presumably from the line in debian/rules).

I upgraded debhelper to version 10.2.5, and then the cairo build
succeeded.

Searching /usr/share/doc/debhelper/changelog.gz for "dbgsym-migration"
finds under the debhelper 9.20160114 entry the item

  * dh_strip: Add "--(no-)automatic-dbgsym" and "--dbgsym-migration"
    options to replace "--(no-)ddebs" and "--ddeb-migration".
    (Closes: #810948)

Accordingly, I suggest adjusting the Build-Depends from
"debhelper (>= 9)" to "debhelper (>= 9.20160114)".

Thanks,

pjrm.