Add MIPS support

src/processor/synth_minidump.h

Index: src/processor/synth_minidump.h
diff --git a/src/processor/synth_minidump.h b/src/processor/synth_minidump.h
index 245afe66c67accbfd3e8ff3845f1f1ad8bd22ad3..6c2f022b6b395ea3895ca1658da5eb372b4af663 100644
--- a/src/processor/synth_minidump.h
+++ b/src/processor/synth_minidump.h
@@ -228,6 +228,7 @@ class Context: public Section {
   // Create a context belonging to DUMP whose contents are a copy of CONTEXT.
   Context(const Dump &dump, const MDRawContextX86 &context);
   Context(const Dump &dump, const MDRawContextARM &context);
+  Context(const Dump &dump, const MDRawContextMIPS &context);
   // Add constructors for other architectures here. Remember to byteswap.
 };