tree-wide: Sort includes

This was done by running a locally built clang-format with
https://github.com/llvm/llvm-project/pull/137617 and
https://github.com/llvm/llvm-project/pull/137840 applied on all .c
and .h files.

src/sysupdate/sysupdate-resource.c

@@ -24,11 +24,11 @@
 #include "process-util.h"
 #include "sort-util.h"
 #include "string-table.h"
+#include "sysupdate.h"
 #include "sysupdate-cache.h"
 #include "sysupdate-instance.h"
 #include "sysupdate-pattern.h"
 #include "sysupdate-resource.h"
-#include "sysupdate.h"
 #include "utf8.h"
 
 void resource_destroy(Resource *rr) {