Update rustdoc-json test

Author: eholk

src/test/rustdoc-json/primitive.rs

@@ -7,8 +7,8 @@ mod usize {}
 
 // @set local_crate_id = primitive.json "$.index[*][?(@.name=='primitive')].crate_id"
 
-// @has - "$.index[*][?(@.name=='log10')]"
-// @!is - "$.index[*][?(@.name=='log10')].crate_id" $local_crate_id
+// @has - "$.index[*][?(@.name=='ilog10')]"
+// @!is - "$.index[*][?(@.name=='ilog10')].crate_id" $local_crate_id
 // @has - "$.index[*][?(@.name=='checked_add')]"
 // @!is - "$.index[*][?(@.name=='checked_add')]" $local_crate_id
 // @!has - "$.index[*][?(@.name=='is_ascii_uppercase')]"