fix path in script/gen_lobatto1d_c.py
fix path in script/gen_lobatto1d_c.py

- bug introduced in ec186b8c69b0719f483e11a864092a21a608a203

RexFuzzle/sfepy,sfepy/sfepy,lokik/sfepy,rc/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,vlukes/sfepy,lokik/sfepy,rc/sfepy,lokik/sfepy,vlukes/sfepy,BubuLK/sfepy,BubuLK/sfepy,sfepy/sfepy,lokik/sfepy,RexFuzzle/sfepy,sfepy/sfepy,rc/sfepy