multiple AM_CONDITIONALs doens't work in CVS Automake

[Lars J. Aas]

When I bootstrap with the current Automake CVS sources, the strudels (@s)
between the conditionals are missing:

> 
>@SIMAGE_JPEG_SUPPORT_FALSESIMAGE_PIC_SUPPORT_FALSESIMAGE_PNG_SUPPORT_FALSESIMAGE_RGB_SUPPORT_FALSESIMAGE_TGA_SUPPORT_FALSESIMAGE_TIFF_SUPPORT_FALSESIMAGE_UNGIF_SUPPORT_TRUE@am_libsimage@SUFFIX@_la_OBJECTS
> = \

  Lars J