mesa 7.2: Add required expat dependancy

[vuplus_openembedded] / classes / nylon-mirrors.bbclass

MIRRORS_append () {
ftp://.*/.*     http://meshcube.org/nylon/stable/sources/
https?://.*/.*  http://meshcube.org/nylon/stable/sources/
ftp://.*/.*     http://meshcube.org/nylon/unstable/sources/
https?://.*/.*  http://meshcube.org/nylon/unstable/sources/
}