Fix the Linux commands

docs/building.md

@@ -123,7 +123,7 @@ Linux support is extremely experimental and presently incomplete.
 The build script uses LLVM/Clang 9. GCC while it should work in theory, is not easily
 interchangeable right now.
 
-* Normal building via `xb build` uses Make.
+* Normal building via `./xb build` uses Make.
 * [CodeLite](https://codelite.org) is supported. `xb devenv` will generate a workspace and attempt to open it. Your distribution's version may be out of date so check their website.
 * Experimental CMake generation is available to facilitate use of other IDEs such as [CLion](https://www.jetbrains.com/clion/). If `clion` is available inside `$PATH`, `xb devenv` will start it. Otherwise `build/CMakeLists.txt` needs to be generated by invoking `xb premake --devenv=cmake` manually.
 
@@ -146,59 +146,59 @@ cd xenia
 ```
 
 ```sh
-xb setup
+./xb setup
 ```
 
 - Build on command line (add --config=release for release):
 ```sh
-xb build
+./xb build
 ```
 
 - Pull latest changes, rebase, update submodules, and run premake:
 ```sh
-xb pull
+./xb pull
 ```
 
 - Format code to the style guide:
 ```sh
-xb format
+./xb format
 ```
 
 - Check for lint errors with clang-format:
 ```sh
-xb lint
+./xb lint
 ```
 
 - Run the style checker on all code:
 ```sh
-xb style
+./xb style
 ```
 
 - Remove all build/ output and do a hard git reset:
 ```sh
-xb nuke
+./xb nuke
 ```
 
 - Runs the clang-tidy checker on all code:
 ```sh
-xb tidy
+./xb tidy
 ```
 
 ## Testing:
 
 - Generate tests:
 ```sh
-xb gentests
+./xb gentests
 ```
 
 - Run tests:
 ```sh
-xb test
+./xb test
 ```
 
 - Run GPU tests:
 ```sh
-xb gputest
+./xb gputest
 ```
 
 ## Other:
@@ -206,7 +206,7 @@ xb gputest
 - Generate SPIR-V binaries and header files:
 
 ```sh
-xb genspirv
+./xb genspirv
 ```
 
 ## Running