gtkmm3/gtkmm4: not set BPN

Set BPN in gtkmm3 and gtkmm4 recipes is to inherit gnomebase.bbclass
properly. But it uses variable GNOMEBN rather than BPN for SRC_URI and
S in gnomebase.bbclass now, update in the recipes accordingly.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-gnome/gtk+/gtkmm3_3.24.7.bb

@@ -8,8 +8,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=4fbd65380cdd255951079008b364516c \
 
 DEPENDS = "glib-2.0-native atkmm pangomm glibmm gtk+3 cairomm gdk-pixbuf-native"
 
-BPN = "gtkmm"
-
+GNOMEBN = "gtkmm"
 
 inherit gnomebase features_check
 

meta-oe/recipes-gnome/gtk+/gtkmm4_4.20.0.bb

@@ -10,7 +10,7 @@ LIC_FILES_CHKSUM = " \
 
 DEPENDS = "glib-2.0-native atkmm pangomm-2.48 glibmm gtk4 cairomm-1.16 gdk-pixbuf-native"
 
-BPN = "gtkmm"
+GNOMEBN = "gtkmm"
 
 inherit gnomebase features_check