8184749: The solaris_x86_32.s and solaris_x86_32.il files should be removed

[George Triantafillou]

Please review this very small JDK-10 enhancement to remove unused 
Solaris assembly files:

JBS: https://bugs.openjdk.java.net/browse/JDK-8184749
webrev: http://cr.openjdk.java.net/~gtriantafill/8184749-webrev/webrev/ 
<http://cr.openjdk.java.net/%7Egtriantafill/8184749-webrev/webrev/>

The change was tested by building on Solaris sparcv9/x64.

Thanks.

-George