Fix path to qemu dir for cros VM tests.

And also roll chromite.

The latest roll is blocked due to the path changing slightly:
https://chromium-review.googlesource.com/c/chromium/src/+/1306765

NOTRY=true

Bug: 897540
Change-Id: Idc753e8b79dcf4c231e05fb9bb6ba3ad7b52592f
Reviewed-on: https://chromium-review.googlesource.com/c/1308014
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604020}

DEPS

@@ -650,7 +650,7 @@ deps = {
 
   # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '5a5616f3bb3bc706fbd30d3b4fc6eee710ea2d7a',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '761322d458eaa3e6dde21e5739accfa03884a26e',
       'condition': 'checkout_linux',
   },
 

build/config/chromeos/rules.gni

@@ -33,7 +33,7 @@ template("generate_vm_runner_script") {
   _cache_path_prefix =
       "//build/cros_cache/chrome-sdk/tarballs/${cros_board}+${cros_sdk_version}"
   _vm_image_path = "${_cache_path_prefix}+chromiumos_qemu_image.tar.xz/"
-  _qemu_dir = "${_cache_path_prefix}+qemu/"
+  _qemu_dir = "${_cache_path_prefix}+app-emulation/"
 
   forward_variables_from(invoker,
                          [