Sort .gitignore using LC_COLLATE=C sort

Change-Id: I422a9283838da2e203f7440ac436c18a5ae8f26f

.gitignore

diff --git a/.gitignore b/.gitignore
index f9af6fc..bc98942 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,14 +1,15 @@
+# LC_COLLATE=C sort
 /.apt_generated/
 /.classpath
+/.primary_build_tool
 /.project
 /.settings/
-/.primary_build_tool
 /bazel-bin
+/bazel-high-availability
 /bazel-out
 /bazel-reviewers
 /bazel-testlogs
-/bazel-high-availability
 /eclipse-out/
+/src/test/docker/gitvolume
 /src/test/docker/pgdata
 /src/test/docker/shareddir
-/src/test/docker/gitvolume