ruby: bump to version 2.3.1

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ruby/ruby.hash

@@ -1,2 +1,2 @@
-# From https://www.ruby-lang.org/en/news/2015/12/25/ruby-2-3-0-released/
-sha256	70125af0cfd7048e813a5eecab3676249582bfb65cfd57b868c3595f966e4097	ruby-2.3.0.tar.xz
+# From https://www.ruby-lang.org/en/news/2016/04/26/ruby-2-3-1-released/
+sha256	6725b5534d5a3a21ec4f14d6d7b9921a0d00d08acb88fd04cd50b47b70496338	ruby-2.3.1.tar.xz

package/ruby/ruby.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 RUBY_VERSION_MAJOR = 2.3
-RUBY_VERSION = $(RUBY_VERSION_MAJOR).0
+RUBY_VERSION = $(RUBY_VERSION_MAJOR).1
 RUBY_VERSION_EXT = 2.3.0
 RUBY_SITE = http://cache.ruby-lang.org/pub/ruby/$(RUBY_VERSION_MAJOR)
 RUBY_SOURCE = ruby-$(RUBY_VERSION).tar.xz