[darcs] use %buildroot and remove .chain-deps

[Jens Petersen]

commit 90ab97e11b00a0737240c2d55afea4db3aff65f1
Author: Jens Petersen <petersen at redhat.com>
Date:   Sun Dec 22 21:54:11 2013 +0900

    use %buildroot and remove .chain-deps

 .chain-deps |    1 -
 darcs.spec  |    4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/darcs.spec b/darcs.spec
index ea92bfd..db2d11b 100644
--- a/darcs.spec
+++ b/darcs.spec
@@ -97,8 +97,8 @@ This package provides the Haskell %{name} library development files.
 %install
 %ghc_lib_install
 
-mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/bash_completion.d
-cp -p contrib/darcs_completion $RPM_BUILD_ROOT%{_sysconfdir}/bash_completion.d/darcs
+mkdir -p %{buildroot}%{_sysconfdir}/bash_completion.d
+cp -p contrib/darcs_completion %{buildroot}%{_sysconfdir}/bash_completion.d/darcs
 
 
 %post -n ghc-%{name}-devel