erlang: fix host version dependencies

Fixes http://autobuild.buildroot.net/results/8816fe16534062cdf0d3a682a7408f9adbea2985

The host version of erlang does not need to enable support for & depend on
host versions of ncurses/openssl/zlib, even if the target version does.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/erlang/erlang.mk

@@ -8,6 +8,7 @@ ERLANG_VERSION = R15B01
 ERLANG_SITE = http://www.erlang.org/download
 ERLANG_SOURCE = otp_src_$(ERLANG_VERSION).tar.gz
 ERLANG_DEPENDENCIES = host-erlang
+HOST_ERLANG_DEPENDENCIES =
 
 ERLANG_LICENSE = EPL
 ERLANG_LICENSE_FILES = EPLICENCE