Libraries (box_lib, buf2d, libimg, tinygl): optimize function import (#231)

Libraries (box_lib, buf2d, libimg, tinygl): optimize function import

Programs updated:
- gears, test3, test_glu1, test_glu2,
- test_array1, textures0, textures1, textures2,
- ctrldemo, editbox_ex, crypt_files, img_transform,
- scrshoot, t_edit, cnc_control, cnc_editor

Reviewed-on: #231
Reviewed-by: Mikhail Frolov <mixa.frolov2003@gmail.com>
Reviewed-by: Ivan B <dunkaist@noreply.localhost>
Co-authored-by: IgorA <aie85playm@gmail.com>
Co-committed-by: IgorA <aie85playm@gmail.com>

programs/develop/libraries/box_lib/import.inc

@@ -0,0 +1,24 @@
+align 4
+import_box_lib:
+
+macro E_LIB n, lfn
+{
+if n eq lib_init
+	dd strz_#n
+else if defined sz_#n
+	n dd sz_#n
+end if
+}
+include 'export.inc'
+	dd 0,0
+macro E_LIB n, lfn
+{
+if used n
+if lfn eq
+	sz_#n db `n,0
+else
+	sz_#n db `lfn,0
+end if
+end if
+}
+include 'export.inc'