libsrtp: enable x86 for secondary arch
libsrtp: enable x86 for secondary arch

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