Merge #10779: Create dependencies.md

e91b96192 Create dependencies.md, and link dependencies file from README & build docs (flack)

Pull request description:

  As @fanquake mentioned in #8639, this should probably be a file in `doc/`, so I went ahead and pulled the issue text via the github API and dumped it into a file. No modifications made, except one spelling fix. This makes the info easier to find, and it will get a proper version history, too.

Tree-SHA512: 6ba4c37c97200972a74724e0e346d6ad5947c01ad18638e15250f2b4cd747dd744aba16e306c98d59f35736542a5eded7a17b6a5ce6aebc63c0a9dc969b365ef

doc/build-windows.md

@@ -62,6 +62,8 @@ A host toolchain (`build-essential`) is necessary because some dependency
 packages (such as `protobuf`) need to build host utilities that are used in the
 build process.
 
+See also: [dependencies.md](dependencies.md).
+
 ## Building for 64-bit Windows
 
 To build executables for Windows 64-bit, install the following dependencies: