Avoid split-sections for Windows rc.

We get an error "too many sections."

Maybe a bug in stack?
https://stackoverflow.com/questions/64287505/ld-too-many-sections-90295

.github/workflows/release-candidate.yml

@@ -31,8 +31,7 @@ jobs:
         versions:
           - osarch: "windows-x86_64"
             arch: "x64"
-            stack_opts: "-j1 --ghc-options=-split-sections"
-
+            stack_opts: "-j1"
     steps:
     - uses: actions/checkout@v1
     - name: Install dependencies