makebuildserver: default memory to 1024MB, so it runs on normal machines

4 gigs is still a common amount of RAM these days for laptops, if the VM
takes almost all of that, it makes the machine drag to almost a halt. Most
apps build fine in 1gig of RAM, indeed that's the default for most CI
instances, like travis-ci and gitlab-ci.

examples/makebuildserver.config.py

@@ -34,7 +34,7 @@
 #
 # debian_mirror = 'http://ftp.uk.debian.org/debian/'
 
-# The amount of RAM the build server will have
+# The amount of RAM the build server will have (default: 1024)
 # memory = 3584
 
 # The number of CPUs the build server will have

makebuildserver

@@ -58,7 +58,7 @@ config = {
     'boot_timeout': 600,
     'cachedir': cachedir,
     'cpus': 1,
-    'memory': 3584,
+    'memory': 1024,
 }
 
 # load config file, if present