d/apertis: Whitelist files that do not affect the licensing

Signed-off-by: Apertis CI <devel@lists.apertis.org>

debian/apertis/copyright.whitelist

+# Ignore everything which is not part of the library code shipped
+# in lib/ and libdane/
+build-aux/
+doc/
+extra/
+gl/
+guile/
+m4/
+src/
+tests/
+fuzz/fuzzer.h
+# Ignore build scripts that do not affect the licensing of the library artifacts
+lib/Makefile*
+lib/**/Makefile*
+libdane/Makefile*
+libdane/**/Makefile*
+# GPL-3 build scripts that not not affect the licensing of the artifacts
+GNUmakefile
+Makefile.am
+Makefile.in
+cfg.mk
+configure.ac
+gtk-doc.make
+maint.mk