pkg-oss scripts break if 'so' included in path

[https://stackoverflow.com/users/93534/notpeter]

The nginx pkg-oss repo uses sed to help rename .so to -debug.so in a couple places. For example

       for so in `find objs/ -maxdepth 1 -type f -name "*.so"`; do \
               debugso=`echo ${so} | sed -e "s|.so|-debug.so|"` ; \
               mv ${so} ${debugso} ; \
        done

Since this sed regex is unarchored it sadly breaks if your path or module name includes 'so' (e.g. ngx_something, /home/alison, /home/me/source/pkg-oss/, etc).

Proposed patch attached.

[thresh]

Thanks!

Fixed in ​http://hg.nginx.org/pkg-oss/rev/e7d65b792793.