meson.build: Add comments to clarify code organization

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20201006125602.2311423-2-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/meson.build b/meson.build
index 17c89c8..68eaf8c 100644
--- a/meson.build
+++ b/meson.build
@@ -1446,6 +1446,10 @@
                              capture: true,
                              command: [undefsym, nm, '@INPUT@'])
 
+########################
+# Library dependencies #
+########################
+
 block_ss = block_ss.apply(config_host, strict: false)
 libblock = static_library('block', block_ss.sources() + genh,
                           dependencies: block_ss.dependencies(),
@@ -1465,6 +1469,10 @@
 
 qmp = declare_dependency(link_whole: [libqmp])
 
+###########
+# Targets #
+###########
+
 foreach m : block_mods + softmmu_mods
   shared_module(m.name(),
                 name_prefix: '',