fix configure typo
fix configure typo

maolin-cdzl/speexdsp,felipebetancur/speexdsp,maolin-cdzl/speexdsp,felipebetancur/speexdsp,felipebetancur/speexdsp,felipebetancur/speexdsp,maolin-cdzl/speexdsp,maolin-cdzl/speexdsp