Bug 1234439 - Add a jar.mn to the end-to-end test. r=gps

Also add the corner case that broke mach build faster on Windows in bug 1191230.

python/mozbuild/mozbuild/test/backend/data/build/jar.mn

@@ -0,0 +1,10 @@
+foo.jar:
+% content bar %child/
+% content foo %
+  foo.js
+  bar.js          (subdir/bar.js)
+  qux.js          (subdir/bar.js)
+* child/hoge.js   (bar.js)
+* child/baz.jsm
+
+% override chrome://foo/bar.svg#hello chrome://bar/bar.svg#hello

python/mozbuild/mozbuild/test/backend/data/build/moz.build

@@ -58,6 +58,10 @@ RESOURCE_FILES.child += [
 
 DEFINES['FOO'] = 'foo'
 
+JAR_MANIFESTS += [
+    'jar.mn',
+]
+
 DIRS += [
     'app',
 ]

python/mozbuild/mozbuild/test/backend/data/build/subdir/bar.js

@@ -0,0 +1 @@
+bar.js

python/mozbuild/mozbuild/test/backend/test_build.py

@@ -83,6 +83,7 @@ class TestBuild(unittest.TestCase):
                                    config.topobjdir)
             overrides = [
                 'install_manifest_depends=',
+                'MOZ_CHROME_FILE_FORMAT=flat',
                 'TEST_MOZBUILD=1',
             ]
             with self.line_handler() as handle_make_line:
@@ -133,7 +134,21 @@ class TestBuild(unittest.TestCase):
             'bin/baz.ini': 'baz.ini: FOO is foo\n',
             'bin/child/bar.ini': 'bar.ini\n',
             'bin/child2/qux.ini': 'qux.ini: BAR is not defined\n',
-            'bin/chrome.manifest': 'manifest components/components.manifest\n',
+            'bin/chrome.manifest':
+                'manifest chrome/foo.manifest\n'
+                'manifest components/components.manifest\n',
+            'bin/chrome/foo.manifest':
+                'content bar foo/child/\n'
+                'content foo foo/\n'
+                'override chrome://foo/bar.svg#hello '
+                'chrome://bar/bar.svg#hello\n',
+            'bin/chrome/foo/bar.js': 'bar.js\n',
+            'bin/chrome/foo/child/baz.jsm':
+                '//@line 2 "%sbaz.jsm"\nbaz.jsm: FOO is foo\n' % (test_path),
+            'bin/chrome/foo/child/hoge.js':
+                '//@line 2 "%sbar.js"\nbar.js: FOO is foo\n' % (test_path),
+            'bin/chrome/foo/foo.js': 'foo.js\n',
+            'bin/chrome/foo/qux.js': 'bar.js\n',
             'bin/components/bar.js':
                 '//@line 2 "%sbar.js"\nbar.js: FOO is foo\n' % (test_path),
             'bin/components/components.manifest':