File ltfat-sourcetarget.patch of Package octave-forge-ltfat

--- a/ltfat/inst/blockproc/java/Makefile	2022-04-08 16:00:19.085405029 +0200
+++ b/ltfat/inst/blockproc/java/Makefile	2022-04-08 16:00:30.209472704 +0200
@@ -2,7 +2,7 @@
 
 JC=javac
 
-FLAGS=-source 1.6 -target 1.6
+FLAGS=-source 1.8 -target 1.8
 include ostools.mk
 
 default: