[MIPS] Support FR=0 emulation on FR=1 64-bit FP registers

Enables running of older MIPS NDK-built apps on mips64r6.

Works with kernel supporting FRE emulation, and old kernels.

Change-Id: I13923fe62cd83ad1d337f13a50f2eda2dfdd906f
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 0a9f6ed..05e5808 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2875,6 +2875,12 @@
     }
   }
 
+#if defined(__mips__) && !defined(__LP64__)
+  if (!mips_check_and_adjust_fp_modes()) {
+    return false;
+  }
+#endif
+
   DEBUG("si->base = %p, si->strtab = %p, si->symtab = %p",
         reinterpret_cast<void*>(base), strtab_, symtab_);