Fix bug: repeated restricted effective conditions.

Test: m all
Change-Id: I0fc8f66dd72e3d3983b9d2b5fa7416c09a776ccc
diff --git a/tools/build-license-metadata.sh b/tools/build-license-metadata.sh
index 3bad358..a138dbe 100755
--- a/tools/build-license-metadata.sh
+++ b/tools/build-license-metadata.sh
@@ -201,6 +201,7 @@
        for d in ${depfiles}; do
          if cat "${d}" | egrep -q 'effective_condition\s*:.*restricted' ; then
            lconditions="${lconditions}${lconditions:+ }restricted"
+           break
          fi
        done
      ;;