fix autotools warning about fsx_CFLAGS and AM_PROG_CC_C_O
fix autotools warning about fsx_CFLAGS and AM_PROG_CC_C_O

guardianproject/libsqlfs,guardianproject/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,spthaolt/libsqlfs,guardianproject/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,guardianproject/libsqlfs,eighthave/libsqlfs