ruby: security bump to version 2.2.2

Fixes:
CVE-2015-1855 - OpenSSL extension’s hostname verification vulnerability.

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/2015/03/03/ruby-2-2-1-released/
-sha256	3b2852c07fdc12d0ba2b5698c7587ae2b46141539a526d143da5860b55a626c0	ruby-2.2.1.tar.xz
+# From https://www.ruby-lang.org/en/news/2015/04/13/ruby-2-2-2-released/
+sha256	f033b5d08ab57083e48c1d81bcd7399967578c370b664da90e12a32891424462	ruby-2.2.2.tar.xz

package/ruby/ruby.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 RUBY_VERSION_MAJOR = 2.2
-RUBY_VERSION = $(RUBY_VERSION_MAJOR).1
+RUBY_VERSION = $(RUBY_VERSION_MAJOR).2
 RUBY_VERSION_EXT = 2.2.0
 RUBY_SITE = http://cache.ruby-lang.org/pub/ruby/$(RUBY_VERSION_MAJOR)
 RUBY_SOURCE = ruby-$(RUBY_VERSION).tar.xz