rina-tools: always use system gcc

component/rina-tools/buildout.cfg

 [buildout]
 extends =
+  ../defaults.cfg
   ../automake/buildout.cfg
   ../git/buildout.cfg
   ../libtool/buildout.cfg
@@ -7,6 +8,9 @@ extends =
 
 parts = rina-tools
 
+[gcc]
+min_version = 0
+
 [irati-stack]
 recipe = slapos.recipe.build:gitclone
 repository = https://github.com/jmuchemb/irati-stack.git

software/build-rina/software.cfg

@@ -8,9 +8,6 @@ parts =
   template
 download-cache = ${:directory}/download-cache
 
-[gcc]
-min_version = 0
-
 [template]
 recipe = slapos.recipe.template:jinja2
 # XXX: "template.cfg" is hardcoded in instanciation recipe