[meta-ti] README: add sample git send-email commandline

[Koen Kooi]

This enables me to copy/paste the right commandline instead of picking the wrong one from bash history.

Signed-off-by: Koen Kooi <koen at dominion.thruhere.net>
---
 README |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/README b/README
index 352cb2e..97439d7 100644
--- a/README
+++ b/README
@@ -28,5 +28,7 @@ BINUVERSION = "2.20.1"
 
 Send pull requests, patches, comments or questions to meta-ti at yoctoproject.org
 
+When sending single patches, please use something like 'git send-email -1 --to meta-ti at yoctoproject.org --subject-prefix=meta-ti'
+
 Maintainers: Denys Dmytriyenko <denys at ti.com>
              Koen Kooi <koen at dominion.thruhere.net>
-- 
1.7.2.5