Add tags for ECP applications that are in Spack.

- All now have both 'ecp' and 'ecp-apps' tags.
- ECP ST projects will eventually also have ecp and ecp-software tags.

var/spack/repos/builtin/packages/latte/package.py

@@ -32,6 +32,8 @@ class Latte(CMakePackage):
     homepage = "https://github.com/lanl/latte"
     url      = "https://github.com/lanl/latte/tarball/v1.0"
 
+    tags = ['ecp', 'ecp-apps']
+
     version('1.1.1', 'ab11867ba6235189681cf6e50a50cc50')
     version('1.0.1', 'd0b99edbcf7a19abe0a68a192d6f6234')
     version('develop', git='https://github.com/lanl/latte', branch='master')