Patch for JNI modules Makefile.PL

I found a problem in the Makefile.PL in the jpl/JNI directory of the perl
source tree and this should patch it. The problem was that it would find
the green_thread directory before native threads on linux.

98c98
<     CCFLAGS => "$Config{ccflags} $CCFLAGS -O2", 
---
>     CCFLAGS => "$Config{ccflags} $CCFLAGS", 
121,122c121,123
<             if (/$name$/ and ! /green_threads/ and !/include-old/) {
<                     $lib = $File::Find::name;
---
>             $pos = $File::Find::name;
>             if (/$name$/ && $pos !~ /green_threads/ && $pos !~ /include-old/) {
> 		$lib = $pos;


P.S. This is my first patch I have submitted so if it is not in the right
format let me know how to format it correctly.