Regenerate liferay-doc-utils.jar

The changes in LRDOCS-1312 weren't propagated properly to the liferay-doc-utils.jar file. Something must have gotten out of sync and the number-headers task broke. No biggie, but thought I'd update it right away.

E:\git-stuff\liferay-docs\develop\tutorials>ant number-headers
Buildfile: E:\git-stuff\liferay-docs\develop\tutorials\build.xml

number-headers:
     [java] Exception in thread "main" java.lang.IllegalArgumentException: Requires 2 arguments: product version purpose docType docDir
     [java]     at com.liferay.documentation.util.NumberHeadersSiteMain.main(Unknown Source)

BUILD FAILED
E:\git-stuff\liferay-docs\build-site-common.xml:89: Java returned: 1

Total time: 1 second