added notice that the version of cmake you get may not be whats needed for it to work.

Building-for-Linux.md

@@ -22,6 +22,7 @@ You'll need to download and install the following to build yuzu:
   - Arch: `pacman -S cmake`
   - Fedora: `dnf install cmake`
   - Gentoo: `emerge dev-util/cmake`
+Note: depending on your distro, the version of CMake you get may not be whats required to build yuzu. Check with cmake --version. Version 3.5 or greater is required for you to be able to build!
 * [Clang](https://github.com/llvm-mirror/clang) 3.8 (optional build alternative)
   - Deb: `apt-get install clang libc++-dev` (in some distros, clang-3.8).
   - Arch: `pacman -S clang`, `libc++` is in the AUR. Use pacaur or yaourt to install it.