.so extension for clarity


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7008 04224531-1f84-46d8-96ce-875b9e37dce3
file extension consistency


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7009 04224531-1f84-46d8-96ce-875b9e37dce3