Update Julia to 0.4.6

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

@@ -32,10 +32,14 @@ class Julia(Package):
 
     version('master',
             git='https://github.com/JuliaLang/julia.git', branch='master')
+    version('release-0.4',
+            git='https://github.com/JuliaLang/julia.git', branch='release-0.4')
+    version('0.4.6', 'd88db18c579049c23ab8ef427ccedf5d', preferred=True)
     version('0.4.5', '69141ff5aa6cee7c0ec8c85a34aa49a6')
     version('0.4.3', '8a4a59fd335b05090dd1ebefbbe5aaac')
 
-    patch('gc.patch')
+    patch('gc.patch', when='@0.4:0.4.5')
+    patch('gc.patch', when='@release-0.4')
     patch('openblas.patch', when='@0.4:0.4.5')
 
     # Build-time dependencies:
@@ -92,11 +96,6 @@ class Julia(Package):
     depends_on("mpi")
 
     def install(self, spec, prefix):
-        if '@master' in spec:
-            # Julia needs to know the offset from a specific commit
-            git = which('git')
-            git('fetch', '--unshallow')
-
         # Explicitly setting CC, CXX, or FC breaks building libuv, one
         # of Julia's dependencies. This might be a Darwin-specific
         # problem. Given how Spack sets up compilers, Julia should