x264: fix x86_64 build.
x264: fix x86_64 build.

* add provides for cmd.

haikuports/haikuports,haikuports/haikuports,nielx/haikuports,koletzky/haikuports,nielx/haikuports,Begasus/haikuports,miqlas/haikuports,moochris/haikuports,haikuports/haikuports,miqlas/haikuports,moochris/haikuports,haikuports/haikuports,Begasus/haikuports,Begasus/haikuports,Begasus/haikuports,haikuports/haikuports,koletzky/haikuports,miqlas/haikuports,nielx/haikuports,Begasus/haikuports,koletzky/haikuports,moochris/haikuports