fix RPATH for rpy2 and scipy.

component/rpy2/buildout.cfg

 [buildout]
 extends =
+  ../gcc/buildout.cfg
   ../r-language/buildout.cfg
 
 # rpy2 needs R in $PATH
@@ -7,7 +8,7 @@ extends =
 # see ../manpy/buildout.cfg as an example
 
 [rpy2_env]
-PATH = ${r-language:location}/bin/:%(PATH)s
+PATH = ${gcc-fortran:location}/bin:${r-language:location}/bin/:%(PATH)s
 CFLAGS = -I${readline:location}/include
 LDFLAGS = -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${r-language:location}/lib/R/lib -Wl,-rpath=${r-language:location}/lib/R/lib
 
@@ -19,3 +20,6 @@ initialization =
   # rpy2 needs R in $PATH
   import os
   os.environ['PATH'] = '${r-language:location}/bin' + os.pathsep + os.environ.get('PATH', '')
+rpath =
+  ${gcc-fortran:location}/lib
+  ${gcc-fortran:location}/lib64

component/scipy/buildout.cfg

@@ -13,3 +13,4 @@ recipe = zc.recipe.egg:custom
 egg = scipy
 environment = scipy-env
 setup-eggs = ${numpy:egg}
+rpath = ${numpy:rpath}