Win64: fix JIT floating-point constant

Repairs commit 71591a62a4 for Win64, where `long` != `intptr_t`
raco pkg: fix doc typo
optimizer report use-before-definition check at debug level

It's too common and noisy as a warning.
change `collection-file-path` to check for compiled by default for ".rkt"
adjust some `collection-file-path` calls to work with binary packages

In a few cases, sources should be preserved in binary mode.
raco decompile: fix for bytecode without source
racket/base: fix `module-compiled-submodules` name handling

Mandled name handling breaks pkg binary-mode submodule stripping.