add dependency of etc/system.rootrc on config/rootrc.in. Make will exit if etc/system.rootrc is not up to date and tell the user to rerun ./configure.
add dependency of etc/system.rootrc on config/rootrc.in. Make will exit if
etc/system.rootrc is not up to date and tell the user to rerun ./configure.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@4971 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT