cannot.find.zip.align=The zipalign tool was not found in the SDK.
Please update to the latest SDK and re-export your application
or run zipalign manually.
Aligning applications allows Android to use application resources
more efficiently.
La solución es copiar zipalign desde sdk/build-tools/android-4.4W hacia sdk/tools, es decir algo parecido a lo siguiente.
# cp adt-bundle/sdk/build-tools/android-4.4W/zipalign adt-bundle/sdk/tools/.