[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/meta/meta-mediatek/classes/get_toolchain_name.bbclass b/meta/meta-mediatek/classes/get_toolchain_name.bbclass
new file mode 100644
index 0000000..a31562d
--- /dev/null
+++ b/meta/meta-mediatek/classes/get_toolchain_name.bbclass
@@ -0,0 +1 @@
+TOOLCHAIN_NAME = "${@bb.utils.contains('TOOLCHAIN','clang','clang','gcc',d)}"