xorg-fonts-100dpi: Change License Custom -> MIT

This is a meta package which collects a bunch of 100dpi font packages
together which all are also under MIT license, Custom is not a known
type moreover MIT is well suited for this recipe for compatibility

Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit c95c94d689)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-graphics/xorg-font/xorg-fonts-100dpi.bb

@@ -1,5 +1,5 @@
 SUMMARY = "Xorg 100 DPI font set"
-LICENSE = "Custom"
+LICENSE = "MIT"
 
 inherit packagegroup distro_features_check
 # rdepends on font recipes with this restriction