add hemdall install

Change-Id: I153cb95fd78eeca382814ddd28b738c65a2bb0bf
diff --git a/_samsung/samsunggalaxya154g.markdown b/_samsung/samsunggalaxya154g.markdown
index 2f7be6a..8e50ba4 100644
--- a/_samsung/samsunggalaxya154g.markdown
+++ b/_samsung/samsunggalaxya154g.markdown
@@ -20,6 +20,8 @@
 

 {% include odininstall.html %}

 

+{% include heimdallinstall.html %}

+

 {% include twrpinstall.html %}

 

 {% include appinstall.html %}