Adjust tests for compatibility with newer xmlsec.

Taken from upstream:

  https://gitlab.com/oath-toolkit/oath-toolkit/-/commit/0ae59b9c72f69ee21044e736e292b73051df3272

diff --git a/libpskc/examples/pskc-hotp-signed.xml b/libpskc/examples/pskc-hotp-signed.xml
index 359dd4723cf2b5ae1ca53d793cc6900a15bd4969..396e0829ff245b3ad6953cc3523d77568c8a18f4 100644
--- a/libpskc/examples/pskc-hotp-signed.xml
+++ b/libpskc/examples/pskc-hotp-signed.xml
@@ -38,7 +38,8 @@ rIXbwqKhnBP943U4Ch31oEbZtbo+XRbiq11wv6dLNsi76TNGDqsjTKgEcSIYI6Vd
 rMxnil6ChoIBvSSPGHhJuj1bW1EPW92JtIa6byrAj1m4RwSviQy2i65YoIdtrhRt
 CWekj2zuL/0szv5rZMCCvxioOCA8znqELEPMfs0Aa/cACD2MZcC4gGXehNCvzYJr
 TmB6lFpxP6f0g6eO7PVcqYN9NCwECxb5Cvx2j2uNlereY35/9oPR6YJx+V7sL+DB
-n6F0mN8OUAFxDamepKdGRApU8uZ35624o/I4</X509Certificate>
+n6F0mN8OUAFxDamepKdGRApU8uZ35624o/I4
+</X509Certificate>
 </X509Data>
 </KeyInfo>
 </Signature></KeyContainer>
diff --git a/pskctool/tests/pskc-all-signed.xml b/pskctool/tests/pskc-all-signed.xml
index 39cf8af5bb00e34fa5e1acb97cea59ff742758f4..5d44e72d928ccf1f46975e6ccca58297e235be95 100644
--- a/pskctool/tests/pskc-all-signed.xml
+++ b/pskctool/tests/pskc-all-signed.xml
@@ -38,7 +38,8 @@ rIXbwqKhnBP943U4Ch31oEbZtbo+XRbiq11wv6dLNsi76TNGDqsjTKgEcSIYI6Vd
 rMxnil6ChoIBvSSPGHhJuj1bW1EPW92JtIa6byrAj1m4RwSviQy2i65YoIdtrhRt
 CWekj2zuL/0szv5rZMCCvxioOCA8znqELEPMfs0Aa/cACD2MZcC4gGXehNCvzYJr
 TmB6lFpxP6f0g6eO7PVcqYN9NCwECxb5Cvx2j2uNlereY35/9oPR6YJx+V7sL+DB
-n6F0mN8OUAFxDamepKdGRApU8uZ35624o/I4</X509Certificate>
+n6F0mN8OUAFxDamepKdGRApU8uZ35624o/I4
+</X509Certificate>
 </X509Data>
 </KeyInfo>
 </Signature></KeyContainer>
diff --git a/pskctool/tests/tst_libexamples.sh b/pskctool/tests/tst_libexamples.sh
index 0e8e558b4cbefbac9f2ca301fddb2ac4b8cfbdfa..5cb52ce44f40a78ab886ff12d2eac64e5b5c4c7e 100755
--- a/pskctool/tests/tst_libexamples.sh
+++ b/pskctool/tests/tst_libexamples.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # tst_libexamples.sh - keep pskctool output in GTK-DOC manual up to date
-# Copyright (C) 2012-2021 Simon Josefsson
+# Copyright (C) 2012-2022 Simon Josefsson
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -45,7 +45,8 @@ fi
 
 $PSKCTOOL --sign --sign-key $srcdir/pskc-ee-key.pem \
     --sign-crt $srcdir/pskc-ee-crt.pem \
-    $srcdir/../../libpskc/examples/pskc-hotp.xml > foo
+    $srcdir/../../libpskc/examples/pskc-hotp.xml \
+    | sed 's,4</X509Cert,4\n</X509Cert,' > foo
 if ! diff -ur $srcdir/../../libpskc/examples/pskc-hotp-signed.xml foo; then
     echo "FAIL: pskctool --sign output change, commit updated file."
     exit 1
diff --git a/pskctool/tests/tst_sign.sh b/pskctool/tests/tst_sign.sh
index b62757336061394746d60f706369127fe1db466d..2d452d69f2e6595ff85a34540939801324dbdfea 100755
--- a/pskctool/tests/tst_sign.sh
+++ b/pskctool/tests/tst_sign.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # tst_sign.sh - test that pskctool can sign and verify
-# Copyright (C) 2012-2021 Simon Josefsson
+# Copyright (C) 2012-2022 Simon Josefsson
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@ $PSKCTOOL --info --strict --debug $pskc_all > tmp-pre-human.txt
 $PSKCTOOL --sign \
     --sign-key $pskc_ee_key \
     --sign-crt $pskc_ee_crt \
-    $pskc_all > tmp-signed.xml
+    $pskc_all | sed 's,4</X509Cert,4\n</X509Cert,' > tmp-signed.xml
 
 diff -ur $pskc_all_signed tmp-signed.xml