Dep/g3d: Enable PCH

(cherry picked from commit e9a2f84fd3f203a1942c87c5c9c38b5b4ff6d051)

dep/g3dlite/CMakeLists.txt

@@ -71,3 +71,14 @@ set_target_properties(g3dlib
     PROPERTIES
       FOLDER
         "dep")
+
+# Generate precompiled header
+if(USE_COREPCH)
+  list(APPEND g3dlib_PCH_HEADERS
+    [["G3D/Any.h"]]
+    [["G3D/Array.h"]]
+    [["G3D/BinaryOutput.h"]]
+    [["G3D/Vector3.h"]])
+
+  add_cxx_pch(g3dlib "${g3dlib_PCH_HEADERS}")
+endif()