NEW:add "extruder_only_area" textures for

double extruder machine
jira:none

Change-Id: Iaf4118fb00641537838dae7cc5fdaaf07ccc9851
(cherry picked from commit a8d6c9fe8976dbcb79c1f89efb7107073cb17856)
(cherry picked from commit c74a769c14d702dbb78d479e49be927028502037)

src/libslic3r/PrintConfig.hpp

@@ -290,6 +290,13 @@ enum BedType {
     btCount
 };
 
+enum class ExtruderOnlyAreaType:unsigned char {
+    btNoArea= 0,
+    Engilish,
+    Chinese,
+    btAreaCount
+};
+
 // BBS
 enum LayerSeq {
     flsAuto,