phplint.sh: fix omitting .php files
phplint.sh: fix omitting .php files

Due to a lack of parentheses in the `find` command, the tests
were only being run on `.inc` files. Now with this fix we test
both `.inc` and `.php` files.

hemberger/smr,smrealms/smr,smrealms/smr,smrealms/smr,hemberger/smr,hemberger/smr,hemberger/smr