update asm to 7.2.

fixes #1274

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=299381828

Author: sameb

pom.xml

@@ -154,7 +154,7 @@ See the Apache License Version 2.0 for the specific language governing permissio
       <dependency>
         <groupId>org.ow2.asm</groupId>
         <artifactId>asm</artifactId>
-        <version>7.1</version>
+        <version>7.2</version>
       </dependency>
       <dependency>
         <groupId>cglib</groupId>