[oe] [meta-oe] README: fix typo

[Gary Thomas]

Without this change, 'git send-email' complains of a missing argument.
Tested with git 1.7.7.6 on Fedora 16.

Signed-off-by: Gary Thomas <gary at mlbassoc.com>
---
 meta-oe/README |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/meta-oe/README b/meta-oe/README
index a195919..ed14866 100644
--- a/meta-oe/README
+++ b/meta-oe/README
@@ -6,7 +6,7 @@ revision: HEAD
 
 Send pull requests to openembedded-devel at lists.openembedded.org with '[meta-oe]' in the subject'
 
-When sending single patches, please use something like 'git send-email -1 --to openembedded-devel at lists.openembedded.org --subject-prefix meta-oe'
+When sending single patches, please use something like 'git send-email -1 --to openembedded-devel at lists.openembedded.org --subject-prefix=meta-oe'
 
 You are encouraged to fork the mirror on github https://github.com/openembedded/meta-oe/ to share your patches, this is preferred for patch sets consisting of more than one patch. Other services like gitorious, repo.or.cz or self hosted setups are of course accepted as well, 'git fetch <remote>' works the same on all of them. We recommend github because it is free, easy to use, has been proven to be reliable and has a really good web GUI.
 
-- 
1.7.7.6