main/kernel-scripts,temp/weston: don't build x86

They don't build for x86 (in case of weston, because the dependency
libunwind does not exist for x86).

aports/main/kernel-scripts/APKBUILD

@@ -6,7 +6,7 @@ url="http://kernel.org"
 depends=""
 makedepends="perl gmp-dev elfutils-dev bash sed bc linux-headers file openssl-dev"
 options="!check"
-arch="all"
+arch="x86_64 armhf aarch64"
 license="GPL-2.0"
 
 # Sources

aports/temp/weston/APKBUILD

@@ -10,7 +10,7 @@ _libname=lib$pkgname
 _libdir=$_libname-${_pkgver%%.*}
 pkgdesc="The reference Wayland server"
 url="http://wayland.freedesktop.org"
-arch="all"
+arch="x86_64 armhf aarch64"
 license="MIT"
 depends=""
 makedepends="wayland-protocols libxkbcommon-dev xkeyboard-config