package/python-setuptools-scm-git-archive: depends on python-setuptools-scm

python-setuptools-scm-git-archive requires python-setuptools-scm package so
add it to its dependencies.

Fixes:
http://autobuild.buildroot.net/results/b356c948cf2b22534ca333cfe34dee31371c0007



Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>