[ELF2][mips] Support elf32ltsmip/elf32btsmip target emulation as the -m arguments

llvm-svn: 249683
diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index aee2a1e..2ae38c9 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -46,6 +46,16 @@
     Config->EMachine = EM_X86_64;
     return;
   }
+  if (Emul == "elf32ltsmip") {
+    Config->ElfKind = ELF32LEKind;
+    Config->EMachine = EM_MIPS;
+    return;
+  }
+  if (Emul == "elf32btsmip") {
+    Config->ElfKind = ELF32BEKind;
+    Config->EMachine = EM_MIPS;
+    return;
+  }
   if (Emul == "elf32ppc") {
     Config->ElfKind = ELF32BEKind;
     Config->EMachine = EM_PPC;