gstreamer: fix build for secondary arch
gstreamer: fix build for secondary arch

nielx/haikuports,nielx/haikuports,moochris/haikuports,haikuports/haikuports,moochris/haikuports,haikuports/haikuports,haikuports/haikuports,Begasus/haikuports,Begasus/haikuports,nielx/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,haikuports/haikuports,Begasus/haikuports