Makefile.am: Fix build issues

We need to tell older version of automake to use the m4/ subdirectory
via the ACLOCAL_AMFLAGS option, and some linkers need library
dependencies to listed after their dependents.

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
bra/view-manager-x11: Add blank GLX view

This is a placeholder for the window in which we'll render application.

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>