repo: add some newer RSA/ECC signing keys

We've been using a DSA/1024 key to sign our tags.  Time to update to
something a bit newer.  We'll include RSA & ECC keys, but only use
RSA keys initially for backwards compatibility and see how it goes
with our user base.

Change-Id: I683c97b6fbd860f220ed4ddc7b21f07db279a916
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/255112
Reviewed-by: David Pursehouse <dpursehouse@collab.net>
Tested-by: Mike Frysinger <vapier@google.com>
diff --git a/repo b/repo
index 40dadac..f7e7581 100755
--- a/repo
+++ b/repo
@@ -137,7 +137,7 @@
 VERSION = (2, 3)
 
 # increment this if the MAINTAINER_KEYS block is modified
-KEYRING_VERSION = (2, 0)
+KEYRING_VERSION = (2, 3)
 
 # Each individual key entry is created by using:
 # gpg --armor --export keyid
@@ -145,7 +145,6 @@
 
      Repo Maintainer <repo@android.kernel.org>
 -----BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1.4.2.2 (GNU/Linux)
 
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 WKtrBqAVMNRLhL85oSlekRz98u41H5si5zcuv+IXJDF5MJYcB8f22wAy15lUqPWi
@@ -181,8 +180,39 @@
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-=CMiZ
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+=82Tj
 -----END PGP PUBLIC KEY BLOCK-----
 """