Version bump for 4.21 stream

Needed by
https://git.eclipse.org/r/c/platform/eclipse.platform.runtime/+/180766

Change-Id: I159b500409f749e2070cd896d085d7ce40ad0100
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.runtime/+/182284
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>

tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF

diff --git a/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF b/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
index 0cb8c2e..a832ca6 100644
--- a/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: Eclipse Core Tests Harness
 Bundle-SymbolicName: org.eclipse.core.tests.harness;singleton:=true
-Bundle-Version: 3.12.0.qualifier
+Bundle-Version: 3.12.100.qualifier
 Bundle-Vendor: Eclipse.org
 Export-Package: org.eclipse.core.tests.harness,
  org.eclipse.core.tests.session,

tests/org.eclipse.core.tests.harness/pom.xml

diff --git a/tests/org.eclipse.core.tests.harness/pom.xml b/tests/org.eclipse.core.tests.harness/pom.xml
index 42094be..c383363 100644
--- a/tests/org.eclipse.core.tests.harness/pom.xml
+++ b/tests/org.eclipse.core.tests.harness/pom.xml
@@ -19,6 +19,6 @@
   </parent>
   <groupId>org.eclipse.core</groupId>
   <artifactId>org.eclipse.core.tests.harness</artifactId>
-  <version>3.12.0-SNAPSHOT</version>
+  <version>3.12.100-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
 </project>