Added -fsigned-char compile flag to ensure ppc gcc treats char the same way as gcc on ix86
Added -fsigned-char compile flag to ensure ppc gcc treats char the same way as gcc on ix86

kkaempf/sblim-sfcb,buccella/SFCB,mchasal/SFCB,mchasal/SFCB,mchasal/SFCB,kkaempf/sblim-sfcb,buccella/SFCB,buccella/SFCB,kkaempf/sblim-sfcb,kkaempf/sblim-sfcb,kkaempf/sblim-sfcb,buccella/SFCB,mchasal/SFCB,buccella/SFCB