Add mipsel-lts image (with multilib)

Add mipsel-lts image (with multilib)

Signed-off-by: Bensuperpc <bensuperpc@gmail.com>

.github/workflows/main.yml

@@ -185,6 +185,24 @@ jobs:
               cpython: "yes",
               cpython_arg: "--host=aarch64-buildroot-linux-gnu --target=aarch64-buildroot-linux-gnu",
             }
+          # Linux mipel images
+          - {
+              image: "linux-mipsel-lts",
+              stockfish: "no",
+              stockfish_arg: "",
+              ninja: "no",
+              ninja_arg: "",
+              openssl: "no",
+              openssl_arg: "",
+              C: "no",
+              C_arg: "",
+              C-Plus-Plus: "yes",
+              C-Plus-Plus_arg: "",
+              fmt: "yes",
+              fmt_arg: "",
+              cpython: "no",
+              cpython_arg: "",
+            }
           # Linux armv5 images
           - {
               image: "linux-armv5",