Fix mips FP abi bug in the linker.

Change-Id: I1ffab938eb06f9dc0963ee15bc10eca216618792
diff --git a/linker/linker_mips.cpp b/linker/linker_mips.cpp
index 4dc97c8..27fb68b 100644
--- a/linker/linker_mips.cpp
+++ b/linker/linker_mips.cpp
@@ -230,7 +230,7 @@
   uint16_t version;  // version of this structure
   uint8_t  isa_level, isa_rev, gpr_size, cpr1_size, cpr2_size;
   uint8_t  fp_abi;  // mips32 ABI variants for floating point
-  uint16_t isa_ext, ases, flags1, flags2;
+  uint32_t isa_ext, ases, flags1, flags2;
 };
 
 // Bits of flags1: