Add .gitignore files based on svn:ignore properties

For the top-level .gitignore, do this via a patch.

debian/.gitignore

@@ -0,0 +1,17 @@
+!/patches
+!*.patch
+!*.diff
+/*.debhelper
+/*.debhelper.log
+/*.substvars
+/control
+/control.md5sum
+/files
+/hyperv-daemons/
+/libusbip-dev/
+/linux-kbuild-*
+/linux-perf-*
+/rules.gen
+/stamps/
+/tmp/
+/usbip/

debian/changelog

@@ -1,3 +1,10 @@
+linux-tools (4.1.4-3) UNRELEASED; urgency=medium
+
+  * Adjust for migration to git:
+    - Update .gitignore files
+
+ -- Ben Hutchings <ben@decadent.org.uk>  Tue, 11 Aug 2015 18:56:56 +0200
+
 linux-tools (4.1.4-2) unstable; urgency=medium
 
   * [mips*,alpha,hppa] linux-perf: Add empty Build files for these architectures

debian/patches/gitignore.patch

@@ -0,0 +1,14 @@
+From: Ben Hutchings <ben@decadent.org.uk
+Date: Tue, 11 Aug 2015 18:52:03 +0200
+Subject: Add gitignore to account for upstream source not being checked in
+Forwarded: not-needed
+
+--- /dev/null
++++ b/.gitignore
+@@ -0,0 +1,6 @@
++#
++# Debian packaging: ignore everything at the top level, since it isn't
++# included in our repository
++#
++/*
++!/debian/

debian/patches/series

@@ -1,3 +1,4 @@
+gitignore.patch
 modpost-symbol-prefix.patch
 tools-perf-version.patch
 tools-perf-install.patch