Log Message:
Changes in 3.8.2 since 3.8.1:
* bootstrap: fix build on mingw-w64
* cmFileCommand: Fix build on mingw-w64
* GNUtoMS: Add search path for VS 2015 environment scripts
* GNUtoMS: Add search path for VS 2017 environment scripts
* FindDevIL: Restore IL_FOUND result variable
* FindOpenSSL: Restore support for crypto-only result
* source_group: Restore TREE support for relative paths
* VS: Fix debugging of C++ executables if CSharp is enabled