[PATCH] --enable/--disable-ogg configure.ac flags
If user has libogg installed, but he wants speex without ogg support there is no way to do that currently, so here we add --enable-ogg and --disable-ogg to control them (did a copycat from current --enable-sse flag to keep it constant)
The patch also removes -O3 from CFLAGS when --enable-sse is called, I'm not sure what compiler optimizations has to do with SSE.
Kindly review and apply the parts accepted.