Expose a single process_wait()

There were two versions: process_wait() and process_wait_noclose().

Expose a single version with a flag (it was already implemented that way
internally).

app/src/util/process.c

@@ -8,7 +8,7 @@ process_check_success(process_t proc, const char *name) {
         LOGE("Could not execute \"%s\"", name);
         return false;
     }
-    exit_code_t exit_code = process_wait(proc);
+    exit_code_t exit_code = process_wait(proc, true);
     if (exit_code) {
         if (exit_code != NO_EXIT_CODE) {
             LOGE("\"%s\" returned with value %" PRIexitcode, name, exit_code);