Revert "package/automake: bump version to 1.16.1"

Revert "package/automake: bump version to 1.16.1"

This reverts commit d36a01273b4d6be2758682784c47ee4e2e610090, which
causes several build breakage. The squid build breakage has a proposed
fix, but it has some comments from Arnout.

In order to reduce the build failure noise in the autobuilders, let's
revert back to the previous version of automake.

Fixes (or rather avoids):

  http://autobuild.buildroot.net/results/2f6ac1663681b702538a2163a02e030880075eda/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>