Makefile: Rename linker response file boolean to be more specific

Rename local variable useResponseFile to useResponseFileForObjects
when it represents CMAKE_<LANG>_USE_RESPONSE_FILE_FOR_OBJECTS.
Windows: Use response files to specify link libraries for GNU tools

Work around the command-line-length limit by using an @linklibs.rsp
response file to pass the flags for link libraries.  This allows
very long lists of libraries to be used in addition to the existing
support for passing object files via response file.

Suggested-by: Peter Keuschnigg <peter.keuschnigg@pmu.ac.at>
Utilities/Release: Fix nightly build upload

Since commit 71b14dcb (Utilities/Release: Do not upload doc staging
tarball, 2014-02-26) the prefix upload_release.cmake computes does not
match any files when used with -DVERSION=master as has been done for the
nightly binary builds.  Since the version is not actually 'master'
anyway, change the nightly binary upload logic to explicitly pass the
destination directory.  Do not pass any VERSION so the default is taken
and matches the binaries.
Merge topic 'fix-nightly-upload' into next

25fb430e Utilities/Release: Fix nightly build upload
Merge topic 'link-libraries-response-files' into next

489b1c23 Windows: Use response files to specify link libraries for GNU tools
745caae6 Makefile: Rename linker response file boolean to be more specific