MIPS: Add signal context definitions for use with Android.

src/platform-linux.cc

Index: src/platform-linux.cc
diff --git a/src/platform-linux.cc b/src/platform-linux.cc
index 6f64f2d31c4873d542fe448c00b386ba2e0f67ee..b8751fa2b38786e40825de0834a180f9a92e7c2e 100644
--- a/src/platform-linux.cc
+++ b/src/platform-linux.cc
@@ -944,6 +944,37 @@ typedef struct ucontext {
 } ucontext_t;
 enum ArmRegisters {R15 = 15, R13 = 13, R11 = 11};
 
+#elif !defined(__GLIBC__) && defined(__mips__)
+  struct sigcontext {
+    unsigned int regmask;
+    unsigned int status;
+    unsigned long long pc;
+    unsigned long long gregs[32];
+    unsigned long long fpregs[32];
+    unsigned int acx;
+    unsigned int fpc_csr;
+    unsigned int fpc_eir;
+    unsigned int used_math;
+    unsigned int dsp;
+    unsigned long long mdhi;
+    unsigned long long mdlo;
+    unsigned long hi1;
+    unsigned long lo1;
+    unsigned long hi2;
+    unsigned long lo2;
+    unsigned long hi3;
+    unsigned long lo3;
+  };
+  typedef uint32_t __sigset_t;
+  typedef struct sigcontext mcontext_t;
+  typedef struct ucontext {
+    uint32_t uc_flags;
+    struct ucontext* uc_link;
+    stack_t uc_stack;
+    mcontext_t uc_mcontext;
+    __sigset_t uc_sigmask;
+  } ucontext_t;
+
 #endif