build: fix scripts/dist.sh

* get OSS version from version/version.go
* fix indenting to two spaces

scripts/dist.sh

@@ -4,8 +4,12 @@ set -e
 # Get the version from the environment, or try to figure it out from the build tags.
 # We process the files in the same order Go does to find the last matching tag.
 if [ -z $VERSION ]; then
-    for file in $(ls version/version_*.go | sort); do
+  # get the OSS version from version.go
+  VERSION=$(awk -F\" '/Version =/ { print $2; exit }' <version/version.go)
+
+  # if we have build tags then try to determine the version
   for tag in "$GOTAGS"; do
+    for file in $(ls version/version_*.go | sort); do
       if grep -q "// +build $tag" $file; then
         VERSION=$(awk -F\" '/Version =/ { print $2; exit }' <$file)
       fi