sysbench: test added, homepage link fixed

Closes Homebrew/legacy-homebrew#36991.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/sysbench.rb

@@ -1,12 +1,12 @@
-require "formula"
-
 class Sysbench < Formula
-  homepage "http://sysbench.sourceforge.net/"
+  homepage "https://launchpad.net/sysbench"
   url "http://ftp.de.debian.org/debian/pool/main/s/sysbench/sysbench_0.4.12.orig.tar.gz"
   sha1 "3f346e8b29b738711546970b027bbb7359d4672a"
+  revision 1
 
   depends_on "autoconf" => :build
   depends_on "automake" => :build
+  depends_on "openssl"
   depends_on :mysql => :recommended
   depends_on :postgresql => :optional
 
@@ -25,4 +25,8 @@ def install
     system "./configure", *args
     system "make", "install"
   end
+
+  test do
+    system "#{bin}/sysbench", "--test=cpu", "--cpu-max-prime=1", "run"
+  end
 end