Check install and distclean

Add buildsteps to test "make install" and "make distclean".

Author: tlyu

buildbot/master.cfg

@@ -138,6 +138,8 @@ f1.addStep(Configure(command="(cd src && util/reconf && ./configure)"))
 f1.addStep(Compile(command="(cd src && make)"))
 f1.addStep(Test(command="(cd src && make check)",
         locks=[testlock.access('exclusive')]))
+f1.addStep(Test(command="(cd src && make install DESTDIR=`pwd`/dest)", description=["intalling"], descriptionDone=["test", "install"]))
+f1.addStep(Test(command="(cd src && make distclean && echo 'checking git status' && if git status -s | grep '^ [DM]'; then exit 1; else :; fi)", description=["cleaning"], descriptionDone=["test", "clean"]))
 
 c['builders'] = []
 branches = ('master', 'krb5-1.9', 'krb5-1.10', 'krb5-1.11', 'krb5-1.12')