Still is broken with the libuyi, do not stage without the bnc911875

- Update to 3.1 final:
* Help: Drop FeatureSummary example in cmake-developer.7
* Help: Extend policy CMP0054 documentation with an example

- Require libarchive 3 due to usage of archive_write_set_format_7zip

- Update to 3.1.0~rc3
* Revert "ClearMatches: Only clear matches which were
actually set" (#15261)
* Help: Document COMPONENT option of install(SCRIPT/CODE)
(#14956)
* Do not use just-built CMake to install itself when
cross-compiling (#15248)
* KWSys SharedForward: Hard-code the ldpath buffer size to
below VS 14 limit
* VS: Rename VS 14 generator to 'Visual Studio 14 2015'
* Help: target_include_directories does not allow target names
* Utilities/Sphinx: Add missing call to note_explicit_target
* FindJava: Do not accept OS X stub 'java' as Java
* Fix lookup of source names after conversion to their actual
case (#15259)
* Help: Format set_property and get_property command docs
* Help: Add 3.1 release notes for INSTALL property scope
* CMakeParseImplicitLinkInfo: Fix implicit library logging
* Makefile: Do not create an empty linker response file
* FindOpenGL: Revert support for imported targets (#15267)
* Help: Document Nsight Tegra toolchain configuration (#15276)
* Utilities/Sphinx: Fix link targets for mixed-case command names
* Modules: Rename FindXerces to FindXercesC
* Help: Document file(GENERATE) signature option order