make_stable: use OP-TEE tag for linaro-swg linux repository

Change script to use OP-TEE release tag for linaro-swg github Linux
kernel repository when applicable to make sure stable release are
referenced with a immutable reference of the kernel source tree.

This change assumes OP-TEE release tag is also created for that
repository.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
diff --git a/make_stable.sh b/make_stable.sh
index e24b7af..b9509b2 100755
--- a/make_stable.sh
+++ b/make_stable.sh
@@ -53,5 +53,6 @@
 		sed "s/\(linaro-swg\/optee_examples.git\"\)/\1 revision=\"refs\/tags\/${VERSION}\" clone-depth=\"1\"/" |
 		sed "s/\(linaro-swg\/optee_benchmark.git\)revision.*/\1\/>/" | # Removes old revision
 		sed "s/\(linaro-swg\/optee_benchmark.git\"\)/\1 revision=\"refs\/tags\/${VERSION}\" clone-depth=\"1\"/" |
+		sed "s/\(linaro-swg\/linux.git\" *\)revision=\"optee\".*/\1revision=\"refs\/tags\/optee-${VERSION}\" clone-depth=\"1\"/" |
 		tee ${FILE} 2>&1 > /dev/null
 done