software/theia: use same gcc config as erp5

So that parts are shared when we install ERP5 in theia

software/theia/software.cfg

@@ -13,6 +13,7 @@ extends =
    ../../component/java-jdk/buildout.cfg
    ../../stack/slapos.cfg
    ../../stack/monitor/buildout.cfg
+   ../../component/defaults.cfg
    ./buildout.hash.cfg
 
 parts =
@@ -23,6 +24,11 @@ parts =
 # default for slapos-standalone
 shared-part-list =
 
+# We keep the gcc part in sync with the one from erp5 software, so that when we install
+# erp5 inside theia's slapos parts can be shared.
+[gcc]
+max_version = 0
+
 
 [nodejs]
 <= nodejs-10.19.0