Merged duneproject bugfix from release.

[[Imported from SVN: r826]]

dune-istl.pc.in

@@ -4,11 +4,12 @@ libdir=@libdir@
 includedir=@includedir@
 CXX=@CXX@
 CC=@CC@
+DEPENDENCIES=@REQUIRES@
 
 Name: @PACKAGE_NAME@
 Version: @VERSION@
 Description: Dune (Distributed and Unified Numerics Environment) istl module
 URL: http://dune-project.org/
-Requires: @REQUIRES@
+Requires: ${DEPENDENCIES}
 Libs:
 Cflags: -I${includedir}