build: Disable libbsd when building zeromq package in depends

Since v4.3.3 (068385c951c0608edec6264d55ba9c4c923acccc) libbsd is used
by default. As we have no libbsd package in our depends, disable it
explicitly. Zeromq will fallback to its internal strlcpy implementation.

Author: hebasto

depends/packages/zeromq.mk

@@ -6,7 +6,8 @@ $(package)_sha256_hash=c593001a89f5a85dd2ddf564805deb860e02471171b3f204944857336
 $(package)_patches=remove_libstd_link.patch netbsd_kevent_void.patch
 
 define $(package)_set_vars
-  $(package)_config_opts=--without-docs --disable-shared --disable-curve --disable-curve-keygen --disable-perf
+  $(package)_config_opts = --without-docs --disable-shared
+  $(package)_config_opts += --disable-perf --disable-curve-keygen --disable-curve --disable-libbsd
   $(package)_config_opts += --without-libsodium --without-libgssapi_krb5 --without-pgm --without-norm --without-vmci
   $(package)_config_opts += --disable-libunwind --disable-radix-tree --without-gcov --disable-dependency-tracking
   $(package)_config_opts += --disable-Werror --disable-drafts --enable-option-checking