fltk: use recent fltk and adjust url

This builds a static libfltk as before, but refers to
new (shared) libs in the system.

fltk.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION fltk-1.3.4_2-0
+# BEE_VERSION fltk-1.3.5-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)
@@ -9,7 +9,7 @@
 ## The source URL(s) define the location of the sources that will be
 ## downloaded. Version variables may be used to simplify reuse of this bee-file.
 
-SRCURL[0]="http://fltk.org/pub/fltk/${PKGVERSION}/fltk-${PKGVERSION}${PKGEXTRAVERSION_DASH}-source.tar.gz"
+SRCURL[0]="https://fltk.org/pub/fltk/${PKGVERSION}/fltk-${PKGVERSION}-source.tar.gz"
 
 ###############################################################################
 ## Add URLs/pathes to patch files to the PATCHURL array.