[PATCH wic 1/2] README.md: add example instruction for sending patches

Quentin Schulz <[email protected]>
Newsgroups org.yoctoproject.lists.yocto-patches
Message-ID <[email protected]>
From: Quentin Schulz <[email protected]>

Let's actually document how to properly generate patches for wic so the
contributor doesn't have to figure this out on their own.

The git-send-email instruction wasn't tested, I just took it from
meta-perl from meta-openembedded and adapted it.

Signed-off-by: Quentin Schulz <[email protected]>
---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index c6fed66..0066ae4 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,13 @@ When sending patches, please make sure the email subject line includes
 "[wic][PATCH]" and follow The Yocto Project community's patch submission
 guidelines.
 
+When generating the patches manually, this will generate what's expected:
+
+   git send-email -M -1 --to [email protected] --subject-prefix='wic][PATCH'
+
+Nothing, except running `b4 send` to actually send the patches, needs to be done
+when using [b4](https://b4.docs.kernel.org/).
+
 ## Licensing
 
 GPL-2.0-only to match the original OpenEmbedded wic tooling.

-- 
2.54.0
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