RFR: 8037529: [asm] add back @Suppress tags, removed by last bulk refresh

[Kumar Srinivasan]

Hello,

Please review fix for adding back @SuppressWarnings tag
http://cr.openjdk.java.net/~ksrini/8037529/webrev.0/

removed inadvertently  with the push for
http://cr.openjdk.java.net/~ksrini/8037221/

Remi, can you please facilitate getting this fix back into the ASM 
source base ?
this will make our lives easier, and of course ASM will compiler cleaner,
alternately ASM could use serialVersionUID for these classes.

Thanks
Kumar