Log the entire command on subprocess.cpp

Bug: 110478603
Test: local & gce
Change-Id: I070b13d4b9e2785cdecad0f4140d7fa178f6cd13
diff --git a/common/libs/utils/subprocess.cpp b/common/libs/utils/subprocess.cpp
index 4fd5f80..aae440f 100644
--- a/common/libs/utils/subprocess.cpp
+++ b/common/libs/utils/subprocess.cpp
@@ -45,7 +45,11 @@
   if (pid == -1) {
     LOG(ERROR) << "fork failed (" << strerror(errno) << ")";
   }
-  LOG(INFO) << "Started " << command[0] << ", pid: " << pid;
+  LOG(INFO) << "Started (pid: " << pid << "): " << command[0];
+  int i = 1;
+  while (command[i]) {
+    LOG(INFO) << command[i++];
+  }
   return pid;
 }