fork the compiler to avoid OOME on clean build

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@22523 71c3de6d-444a-0410-be80-ed276b4c234a

core/pom.xml

@@ -56,7 +56,7 @@ THE SOFTWARE.
       <plugin>
         <groupId>org.kohsuke.stapler</groupId>
         <artifactId>maven-stapler-plugin</artifactId>
-        <version>1.12</version>
+        <version>1.13</version>
         <extensions>true</extensions>
         <dependencies>
           <dependency>
@@ -65,6 +65,10 @@ THE SOFTWARE.
             <version>1.4</version>
           </dependency>
         </dependencies>
+        <configuration>
+          <fork>true</fork><!-- the source code is big enough now that otherwise it fails with OutOfMemoryError -->
+          <maxmem>128m</maxmem>
+        </configuration>
       </plugin>
       <plugin>
         <groupId>org.jvnet.localizer</groupId>