Brought back ruby 2.7.1 as it still needed by some projects

Makefile

@@ -5,3 +5,11 @@ all:
 	-$(MAKE) -C ruby-3.0.1 check
 	$(MAKE) -C ruby-3.0.1 install
 	rm -rf ruby-3.0.1
+
+2-7-1:
+	tar xf ruby-2.7.1.tar.xz
+	cd ruby-2.7.1 && ./configure --prefix=/usr --enable-shared --docdir=/usr/share/doc/ruby-2.7.1 --disable-install-doc
+	$(MAKE) -C ruby-2.7.1
+	-$(MAKE) -C ruby-2.7.1 check
+	$(MAKE) -C ruby-2.7.1 install
+	rm -rf ruby-2.7.1

ruby.2-7-1.groups

+headers
+	/usr/include/.*
+man
+	/usr/share/man/.*
+bin
+	/usr/bin/.*
+pkg
+	/usr/lib/pkgconfig/.*
+lib
+	/usr/lib/ruby/.*
+	/usr/lib/lib.*