Bug 1094302 - Move JS module installation into the misc tier; r=glandium

JS module installation performs simple file copying or preprocessing.
There is no reason it can't occur in parallel. Move it to the misc tier.

As part of this, I recognized that TESTING_JS_MODULES was assigned to a
tier. Since these files are managed by an install manifest, they don't
belong to any tier. So the tier is now listed as None.

--HG--
extra : rebase_source : 963f0813e43802c017837ce9d55f8e666decd76a

python/mozbuild/mozbuild/backend/recursivemake.py

@@ -922,6 +922,7 @@ INSTALL_TARGETS += %(prefix)s
                                    % (prefix, ' '.join(strings)))
                 backend_file.write('%s_DEST = %s\n' %
                                    (prefix, mozpath.join('$(FINAL_TARGET)', 'modules', path)))
+                backend_file.write('%s_TARGET := misc\n' % prefix)
                 backend_file.write('INSTALL_TARGETS += %s\n\n' % prefix)
             return
 
@@ -935,6 +936,7 @@ INSTALL_TARGETS += %(prefix)s
                                    % (prefix, ' '.join(strings)))
                 backend_file.write('%s_PATH = %s\n' %
                                    (prefix, mozpath.join('$(FINAL_TARGET)', 'modules', path)))
+                backend_file.write('%s_TARGET := misc\n' % prefix)
                 backend_file.write('PP_TARGETS += %s\n\n' % prefix)
             return
 

python/mozbuild/mozbuild/frontend/context.py

@@ -518,14 +518,14 @@ VARIABLES = {
 
         This variable contains a list of files to copy into
         ``$(FINAL_TARGET)/modules.
-        """, 'libs'),
+        """, 'misc'),
 
     'EXTRA_PP_JS_MODULES': (HierarchicalStringList, list,
         """Additional JavaScript files to distribute.
 
         This variable contains a list of files to copy into
         ``$(FINAL_TARGET)/modules``, after preprocessing.
-        """, 'libs'),
+        """, 'misc'),
 
     'TESTING_JS_MODULES': (HierarchicalStringList, list,
         """JavaScript modules to install in the test-only destination.
@@ -537,7 +537,7 @@ VARIABLES = {
         variable to control the final destination. e.g.
 
         ``TESTING_JS_MODULES.foo += ['module.jsm']``.
-        """, 'libs'),
+        """, None),
 
     'EXTRA_PP_COMPONENTS': (StrictOrderingOnAppendList, list,
         """Javascript XPCOM files.