Add git-lfs to prerequisites in README.md

Build will fail unless git-lfs is installed.

Closes https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/-/issues/35.

Signed-off-by: Kristijonas Ciulcinskas kristijonas.ciulcinskas@huawei.com

README.md

@@ -64,13 +64,15 @@ projects for building OpenHarmony reference implementation.
 
 ## General usage
 
-In order to build with this layer, you need to use a compatible host OS. See
-https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html
-for details on this. Sections
-https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html#compatible-linux-distribution
-and
-https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html#build-host-packages
-in particular.
+### Prerequisites
+
+In order to build with this layer, you need to use a compatible host OS. See [yocto brief](https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html) for details on this. Sections [yocto for linux](https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html#compatible-linux-distribution) and [yocto host packages](https://docs.yoctoproject.org/3.1.8/brief-yoctoprojectqs/brief-yoctoprojectqs.html#build-host-packages) in particular.
+
+Make sure to update as well as install git-lfs which wasn't required in yocto docs:
+
+	sudo apt-get update && sudo apt-get install git-lfs
+
+### Setting-up
 
 To use the meta-openharmony layer, you need a build setup with BitBake and all
 needed Yocto layers.