[devhelp] meson: remove build/ directory

[Sébastien Wilmet <swilmet src gnome org>]

commit 10d16bc0171b4bc2d93ccdf1a8cf1cdece686bf3
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Mar 12 14:57:34 2018 +0100

    meson: remove build/ directory
    
    With jhbuild with "buildroot = None" (srcdir == builddir), the
    build/.gitignore file is deleted.
    
    What can be done once the Autotools files are deleted is to add a
    toplevel .gitignore to ignore build/.

 build/.gitignore |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)