Revert inadvertent (albeit necessary for me) commit

git-svn-id: http://root.cern.ch/svn/root/trunk@48628 27541ba8-7e3a-0410-8455-c3a389f83636

build/unix/makeonepch.sh

@@ -119,6 +119,6 @@ find include -name \*.h | sed -e 's|include/|#include "|' -e 's|$|"|' \
 mv all.h include/all.h
 
 # generate the pch
-# clang++ -x c++-header -Iinclude include/all.h -o include/all.h.pch
+clang++ -x c++-header -Iinclude include/all.h -o include/all.h.pch
 
 exit $?