Be consistent about "kilo" versus "kibi".

I'm a binary man myself, but we've mostly used decimal so far, and wider
Android is mostly decimal, so...

Change-Id: Ibef78f61176569e0023a7f43196a3969c7fe794b
diff --git a/src/utils.cc b/src/utils.cc
index 1c00712..127c18f 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -351,7 +351,7 @@
   } else if ((size_in_bytes / MB) * MB == size_in_bytes) {
     return StringPrintf("%zdMB", size_in_bytes / MB);
   } else if ((size_in_bytes / KB) * KB == size_in_bytes) {
-    return StringPrintf("%zdKiB", size_in_bytes / KB);
+    return StringPrintf("%zdKB", size_in_bytes / KB);
   } else {
     return StringPrintf("%zdB", size_in_bytes);
   }