core: use codified default for prerelease string

scripts/build.sh

@@ -40,11 +40,11 @@ fi
 export CGO_ENABLED=0
 
 # Allow LD_FLAGS to be appended during development compilations
-LD_FLAGS="-X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY} -X github.com/hashicorp/terraform/terraform.VersionPrerelease=dev $LD_FLAGS"
+LD_FLAGS="-X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY} $LD_FLAGS"
 
 # In release mode we don't want debug information in the binary
 if [[ -n "${TF_RELEASE}" ]]; then
-    LD_FLAGS="-X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY} -s -w"
+    LD_FLAGS="-X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY} -X github.com/hashicorp/terraform/terraform.VersionPrerelease= -s -w"
 fi
 
 # Build!

terraform/version.go

@@ -12,7 +12,7 @@ const Version = "0.9.6"
 // A pre-release marker for the version. If this is "" (empty string)
 // then it means that it is a final release. Otherwise, this is a pre-release
 // such as "dev" (in development), "beta", "rc1", etc.
-var VersionPrerelease string
+var VersionPrerelease = "dev"
 
 // SemVersion is an instance of version.Version. This has the secondary
 // benefit of verifying during tests and init time that our version is a