[Lazarus] SVN compile of Lazarus has a problem with "make install" on Windows

[ABorka]

Windows 8 64bit
Latest Lazarus SVN

1. make all (works OK)
2. make install
gives error when the copying of startlazarus.exe, lazbuild.exe, 
lazarus.exe comes, because it tries to copy these files without 
extension and that does not exist.
Renaming them to do not have extension fixes the issue (obviously) but 
after the install finishes we need to name them back in the destination 
directory to .exe .

AB