Merge pull request #711 from cgay/compiler-verbose-flag

Add a -verbose flag to dylan-compiler.
Improve configure checking for verbose flag.

If the installed dylan-compiler supported the "-verbose" flag, then
it wasn't getting the "-build" command added as it didn't match the
various test statements. So we just add -build when we add -verbose.
Don't add -verbose when we're coming in as part of a 'make'.

When coming in via 'make' rather than 'make 3-stage-bootstrap', this
may be an old or new compiler, so let the configure checks handle
everything appropriately.
Merge pull request #712 from dylan-lang/fix-compilation-without-bootstrapping

Fix compilation without bootstrapping
Update release notes for compiler -verbose flag.