Adding internal SODA repo to .gitignore

Bug: 1056809
Change-Id: Ib787b4495a05a78a3e49bc00e4770d81a23fafec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080088Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Evan Liu <evliu@google.com>
Cr-Commit-Position: refs/heads/master@{#745624}

.gitignore

@@ -132,6 +132,7 @@ vs-chromium-project.txt
 /chrome/installer/mini_installer_tests_run.xml
 /chrome/installer_util_strings.xml
 /chrome/interactive_ui_tests_run.xml
+/chrome/services/soda/internal
 /chrome/setup.xml
 /chrome/setup_unittests.xml
 /chrome/sync_integration_tests_run.xml