smartmontools: package a script for sending email notifications

A separate package which depdens on msmtp and nail is introduced.
Once more packages provide `sendmail` and `mail` interfaces, this
dependency can be made more flexible.

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>

utils/smartmontools/patches/002-os_mailer-is-mailx.patch

@@ -0,0 +1,13 @@
+diff --git a/configure b/configure
+index 6f442b3..5803c83 100755
+--- a/configure
++++ b/configure
+@@ -6988,7 +6988,7 @@ releaseversion='${PACKAGE}-${VERSION}'
+ # Set platform-specific modules and symbols
+ os_libs=
+ os_dltools='curl wget lynx svn'
+-os_mailer=mail
++os_mailer=mailx
+ os_hostname="'hostname'"
+ os_dnsdomainname=
+ os_nisdomainname="'domainname'"