Merge pull request #34 from Asmod4n/master

expose libzmq include path to other gems

Author: Asmod4n

mrbgem.rake

@@ -31,8 +31,8 @@ MRuby::Gem::Specification.new('mruby-zmq') do |spec|
     spec.linker.flags_before_libraries << "\"#{spec.build_dir}/build/lib/libzmq.a\""
     `pkg-config --cflags \"#{spec.build_dir}/build/libzmq.pc\"`.split("\s").each do |cflag|
       if cflag.start_with?('-I')
-        spec.build.cxx.include_paths << cflag[2..] # strip "-I"
-        spec.build.cc.include_paths << cflag[2..]
+        build.cxx.include_paths << cflag[2..] # strip "-I"
+        build.cc.include_paths << cflag[2..]
       end
       spec.cxx.flags << cflag
       spec.cc.flags << cflag