rpm4 on carme*

[Jan Palus]

If commit message includes '%' then rpmbuild spawned by builder script
fails. See ie test.spec which includes '%prep':

error: line 40: second %prep

builder creates spec copy with %changelog appended. Apparently rpm.org
evaluates macros in %changelog while rpm5 does not. Not sure whether
we're supposed to escape macros in changelog now or whether rpm.org
should read %changelog as is.