community/afl: disable in x86

Build error:

> /bin/sh: ../afl-clang-fast: not found

community/afl/APKBUILD

@@ -5,7 +5,7 @@ pkgver=2.52b
 pkgrel=0
 pkgdesc="Fuzzer relying on genetic algorithms instead of brute force"
 url="http://lcamtuf.coredump.cx/afl/"
-arch="all !armhf"
+arch="all !x86 !armhf"
 license="Apache-2.0"
 depends="clang llvm"
 makedepends="clang-dev llvm-dev"