[elastic] Add CGO_ENABLED=0 when we build the go lsp.

'CGO_ENABLED=0' will enable a full statically linked binary to get rid
of the libc dependency. This option will make the go lsp more portable.

Author: Henry Wong

.travis.yml

@@ -19,7 +19,10 @@ git:
   depth: 1
 
 env:
-  - GO111MODULE=off GOPROXY=https://proxy.golang.org
+  - GO111MODULE=off
+  - GOPROXY=https://proxy.golang.org
+  - CGO_ENABLED=0
+  - ARCH=x86_64
 
 before_install:
   - go get golang.org/x/sync/errgroup

appveyor.yml

@@ -17,6 +17,7 @@ environment:
   GOPATH: c:\gopath
   GO111MODULE: off
   GOPROXY: "https://proxy.golang.org"
+  CGO_ENABLED: 0
   github_access_token:
     secure: h4ICNdm1D4g1klCMU6lQ7t92lwIrzo2HHzqc9MJpZdibgfNNFNGwywHWyBa0KPpL
   github_email: