app-crypt/clevis and friends: Add self as co-maintainer

I already use dev-libs/jose in another pakcage (sys-login/sssd) I maintain.
I'd like to see app-crpyt/clevis graduate to Portage but there's lot of be done
In order to beat these packages to shape, I'm adding myself to keep them updated
and submit patches upstream.

Signed-off-by: Christopher Byrne <salah.coronya@gmail.com>

app-crypt/clevis/metadata.xml

@@ -5,6 +5,10 @@
 		<email>julien@jroy.ca</email>
 		<name>Julien Roy</name>
 	</maintainer>
+	<maintainer type="person">
+		<email>salah.coronya@gmaul.com</email>
+		<name>Christopher Byrne</name>
+	</maintainer>
 	<upstream>
 		<remote-id type="github">latchset/clevis</remote-id>
 	</upstream>

app-crypt/tang/metadata.xml

@@ -5,6 +5,10 @@
 		<email>julien@jroy.ca</email>
 		<name>Julien Roy</name>
 	</maintainer>
+	<maintainer type="person">
+		<email>salah.coronya@gmaul.com</email>
+		<name>Christopher Byrne</name>
+	</maintainer>
 	<upstream>
 		<remote-id type="github">latchset/tang</remote-id>
 	</upstream>

dev-libs/luksmeta/metadata.xml

@@ -5,6 +5,10 @@
 		<email>julien@jroy.ca</email>
 		<name>Julien Roy</name>
 	</maintainer>
+	<maintainer type="person">
+		<email>salah.coronya@gmaul.com</email>
+		<name>Christopher Byrne</name>
+	</maintainer>
 	<upstream>
 		<remote-id type="github">latchset/luksmeta</remote-id>
 	</upstream>