unstable: OS X build is broken

[afrocheese]

The OS X build fails to a bug in golang (golang/go#25908).

➜  usercorn git:(unstable) make
mkdir -p .gopath/src/github.com/lunixbochs
ln -s ../../../.. .gopath/src/github.com/lunixbochs/usercorn
go get -u github.com/chzyer/readline github.com/golang/snappy github.com/jroimartin/gocui github.com/keystone-engine/keystone/bindings/go/keystone github.com/lunixbochs/argjoy github.com/lunixbochs/capstr github.com/lunixbochs/fvbommel-util/sortorder github.com/lunixbochs/ghostrace/ghost/memio github.com/lunixbochs/ghostrace/ghost/sys/num github.com/lunixbochs/luaish github.com/lunixbochs/luaish-luar github.com/lunixbochs/luaish/parse github.com/lunixbochs/readline github.com/lunixbochs/struc github.com/mgutz/ansi github.com/pkg/errors github.com/shibukawa/configdir github.com/unicorn-engine/unicorn/bindings/go/unicorn
rm -f usercorn
go build -o usercorn ./go/cmd/main
# _/tmp/usercorn/go/cmd/main
/tmp/usercorn/deps/go-x86_64-Darwin/pkg/tool/darwin_amd64/link: /tmp/usercorn/deps/go-x86_64-Darwin/pkg/tool/darwin_amd64/link: combining dwarf failed: Unknown load command 0x32 (50)

Let me know if you'd like me to just wrap this into a PR instead.

diff --git a/Makefile b/Makefile
index 7841386..1ba2aea 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ ifeq "$(OS)" "Darwin"
 endif

 # figure out if we can download Go
-GOVERSION=1.10.1
+GOVERSION=1.10.8
 ifeq "$(ARCH)" "x86_64"
        ifeq "$(OS)" "Darwin"
                GOURL = "https://storage.googleapis.com/golang/go$(GOVERSION).darwin-amd64.tar.gz"

[lunixbochs]

Sure, can you wrap this in a PR?

[lunixbochs]

merged, thanks!