updated build instructions

site/docs/build/index.md

@@ -138,6 +138,8 @@ Separate scripts also exist:
 
     sudo ./build dependencies arch
 
+    sudo ./build dependencies void
+
 Technically, any GNU+Linux distribution can be used to build Libreboot.
 However, you will have to write your own script for installing build
 dependencies. 

site/docs/install/spi.md

@@ -234,6 +234,10 @@ install flashrom. Do this after downloading the
 
     cd lbmk
     sudo ./build dependencies ubuntu2004
+
+NOTE: debian, arch or void can be written instead of ubuntu2004. the debian
+script is also applicable to newer ubuntu versions
+
     ./download flashrom
     ./build module flashrom