config/git/www and www-img: import libreboot.org

it's not used by anywhere else in lbmk, but the release build
script will automatically download each project named as per
file names in config/git/

this is a stupidly simply way to prove documentation in
libreboot releases, and i've used current revisions corresponding
to the Libreboot 20231021 release, for this 20231021 release
of lbmk.

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/git/www

@@ -0,0 +1,6 @@
+{www}{
+	rev: f3001eae5724ef38fe512a378148a2d619a0ff24
+	loc: www
+	url: https://codeberg.org/libreboot/lbwww
+	bkup_url: https://git.disroot.org/libreboot/lbwww
+}

config/git/www-img

@@ -0,0 +1,6 @@
+{www}{
+	rev: 918c0ba07cf45f07836fa8c312fc51b48db32e0a
+	loc: www-img
+	url: https://codeberg.org/libreboot/lbwww-img
+	bkup_url: https://git.disroot.org/libreboot/lbwww-img
+}