We have a few libraries that, for one reason or another, use non-standard LDFLAGS. There is typically no good reason for this, just historical accidents.

This patch fixes several places to remove odd or unneeded LDFLAGS, and to make them conform better to the prevailing standard. This will facilitate even more future cleanups in this area.

We still have some "snowflakes" left that have tricky LDFLAGS, but they require more research to figure out the best way to handle.