remove any previous pch file to avoid that an alternative version is created (happens with icc which creates .ipch$1, .ipch$2, etc.).
remove any previous pch file to avoid that an alternative version is created
(happens with icc which creates .ipch$1, .ipch$2, etc.).


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@14386 27541ba8-7e3a-0410-8455-c3a389f83636

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