Bug#262607: FTBFS when "gain-root" command gains real root

[Robert Millan]

Package: exim4
Severity: serious

Building exim4 when "gain-root" command gains real root (e.g. -rsudo)
leaves the source tree in an unconsistent state. The next time build is
attempted (either with -rsudo or -rfakeroot) it will fail with:

[...]
 debian/rules build
test -d debian/patched || install -d debian/patched
dpatch  apply-all  
[...]
applying patch 34_eximstatsmanpage to ./ ...patch: **** can't open file src/eximstats.src : Permission denied
 failed.
make: *** [patch-stamp] Error 1


-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.4.26-1-686
Locale: LANG=C, LC_CTYPE=C (ignored: LC_ALL set to C)