tests/gpg-verify-data: Split out signature data

The full block with all 5 signatures remains, but this allows passing
individual signatures through the GPG verification APIs. The split was
done with `gpgsplit`, and looking at the output of `gpg --list-packets`
of the split and unsplit files appears correct.

Makefile-tests.am

@@ -229,7 +229,8 @@ dist_gpginsttest_revoc_DATA = \
 
 gpgvinsttestdir = $(installed_testdir)/gpg-verify-data
 dist_gpgvinsttest_DATA = $(addprefix tests/gpg-verify-data/, \
-	gpg.conf lgpl2 lgpl2.sig pubring.gpg secring.gpg trustdb.gpg)
+	gpg.conf lgpl2 lgpl2.sig lgpl2.sig0 lgpl2.sig1 lgpl2.sig2 lgpl2.sig3 \
+	lgpl2.sig4 pubring.gpg secring.gpg trustdb.gpg)
 endif
 endif
 

tests/gpg-verify-data/README.md

@@ -1,5 +1,7 @@
 This is a GPG config directory for use with the OstreeGpgVerifyResult
-test cases. The test data (`lgplv2`) is signed with a variety of valid
-and invalid GPG keys in a detached signature file (`lgplv2.sig`).
+test cases. The test data (`lgpl2`) is signed with a variety of valid
+and invalid GPG keys in a detached signature file (`lgpl2.sig`). In
+addition, each detached signature is available in a separate file
+(`lgpgl2.sig<N>`).
 
 The passphrase for all the keys is `redhat`.