[ros-svn] [mf] 18228: a bit of Makefile and string constants cleanup

[mf at svn.reactos.com]

a bit of Makefile and string constants cleanup


Updated files:
trunk/reactos/subsys/system/explorer/Makefile.MinGW
trunk/reactos/subsys/system/explorer/Makefile.PCH
trunk/reactos/subsys/system/explorer/Makefile.Wine
trunk/reactos/subsys/system/explorer/utility/xmlstorage.cpp
trunk/reactos/subsys/system/explorer/utility/xmlstorage.h