[RPM] Update rpm/default.cfg to build on F30

Author: daniviga

rpm/default.cfg

@@ -10,10 +10,12 @@ OUTDIR="result/"
 
 # Which arches to build for. Check /etc/mock for possible options
 ARCHS=(
-        "fedora-27-i386"
-        "fedora-27-x86_64"
         "fedora-28-i386"
         "fedora-28-x86_64"
+        "fedora-29-i386"
+        "fedora-29-x86_64"
+        "fedora-30-i386"
+        "fedora-30-x86_64"
       )
 
 # Which git branch to export. Normally take the current