Disable locale support

This gets rid of usr/share/locale (which was presumably removed manually
for RescueOS releases).  Reduces rootfs tarball size by nearly 4 MB.

buildrootconfig

@@ -5,7 +5,7 @@ BR2_EXTRA_GCC_CONFIG_OPTIONS="MAKEINFO=missing"
 BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
 BR2_TOOLCHAIN_BUILDROOT_INET_IPV6=y
 BR2_TOOLCHAIN_BUILDROOT_INET_RPC=y
-BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
+BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="rescueos"
 BR2_TARGET_GENERIC_ISSUE="Welcome to RescueOS"