Update Coverity submission command

The old scan5.coverity.com submission URL stopped working on July.
Update the URL and form fields based on the current instructions.

Author: greghudson

buildbot/master.cfg

@@ -175,7 +175,7 @@ f3.addStep(Git(repourl=anonrepo, mode="clobber"))
 f3.addStep(Configure(command="(cd src && util/reconf && ./configure --with-ldap)"))
 f3.addStep(Compile(command="(cd src && cov-build --dir cov-int make)"))
 f3.addStep(ShellCommand(command=["tar", "-C", "src", "-zcf", "kerberos.tgz", "cov-int"], description="tar", haltOnFailure=True))
-f3.addStep(ShellCommand(command="curl --insecure --include --form [email protected] --form project=kerberos --form password=$(cat $HOME/coverity-password) --form [email protected] https://scan5.coverity.com/cgi-bin/upload.py", description="uploading", descriptionDone="upload"))
+f3.addStep(ShellCommand(command="curl --include --form [email protected] --form token=$(cat $HOME/coverity-password) --form [email protected] --form version=master --form description=krb5 https://scan.coverity.com/builds?project=kerberos", description="uploading", descriptionDone="upload"))
 
 # The slave for the Coverity scan must have the cov-analysis binaries
 # installed in the slave's path and must have the build password in