RFR(T) : 8252778 : remove jdk.test.lib.FileInstaller action from compiler/c2/stemmer test

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8252778/webrev.00/
> 2 lines changed: 0 ins; 1 del; 1 mod; 

Hi all,

could you please review this small and trivial cleanup?
from JBS:
> `compiler/c2/stemmer` test uses `jdk.test.lib.FileInstaller` to copy "words" file from the test source directory to the current working directory, `compiler.c2.stemmer.Stemmer` can read this file. yet, `c.c.s.Stemmer` class treats its 1st argument as a path to the file, given this isn't needed and we can pass "${test.src}/words" instead of "words"

testing: compiler/c2/stemmer on {linux,windows,macos}-x64
JBS: https://bugs.openjdk.java.net/browse/JDK-8252778
webrev: http://cr.openjdk.java.net/~iignatyev//8252778/webrev.00/

Thanks,
-- Igor