[infra] Add config for custom hunk text when using git diff on status files

To enable this, run "git config --add --local include.path ../.gitconfig"

Change-Id: I7f8660f046d562adadd726c47ab2d977cf0d772b
Reviewed-on: https://dart-review.googlesource.com/57511
Reviewed-by: Jonas Termansen <sortie@google.com>
diff --git a/.gitattributes b/.gitattributes
index 8f4b8ba..b7d52e5 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -53,3 +53,5 @@
 *.png binary
 *.jpg binary
 *.xpi binary
+
+*.status diff=status
diff --git a/.gitconfig b/.gitconfig
new file mode 100644
index 0000000..7df539b
--- /dev/null
+++ b/.gitconfig
@@ -0,0 +1,2 @@
+[diff "status"]
+	xfuncname = "^\\[.*\\]$"