Bug#893420: swt-gtk FTBFS with openjdk-9

[Adrian Bunk]

Source: swt-gtk
Version: 3.8.2-4
Severity: serious

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/swt-gtk.html

...
/usr/bin/make -f debian/Makefile -C . CFLAGS="-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Wdate-time -D_FORTIFY_SOURCE=2" CXXFLAGS="-g -O2 -fstack-protector-strong -Wformat -Werror=format-security" CPPFLAGS="-Wdate-time -D_FORTIFY_SOURCE=2" LDFLAGS="-Wl,-z,relro" 
make[1]: Entering directory '/build/1st/swt-gtk-3.8.2'
find org -name *.java -o -name *.properties | sort > swt-gtk-3.8.2.files
mkdir -p swt-gtk-3.8.2
grep \.java swt-gtk-3.8.2.files | xargs -r javac -classpath . -source 1.5 -target 1.5 -d swt-gtk-3.8.2
warning: [options] bootstrap class path not set in conjunction with -source 1.5
error: Source option 1.5 is no longer supported. Use 1.6 or later.
error: Target option 1.5 is no longer supported. Use 1.6 or later.
make[1]: *** [debian/Makefile:25: swt-gtk-3.8.2-stamp] Error 123