Handle ios dump.

src/processor/minidump_processor.cc

Index: src/processor/minidump_processor.cc
===================================================================
--- src/processor/minidump_processor.cc	(revision 854)
+++ src/processor/minidump_processor.cc	(working copy)
@@ -386,6 +386,11 @@
       break;
     }
 
+    case MD_OS_IOS: {
+      info->os = "iOS";
+      break;
+    }
+
     case MD_OS_LINUX: {
       info->os = "Linux";
       break;
@@ -451,7 +456,8 @@
     return reason;
 
   switch (raw_system_info->platform_id) {
-    case MD_OS_MAC_OS_X: {
+    case MD_OS_MAC_OS_X:
+    case MD_OS_IOS: {
       char flags_string[11];
       snprintf(flags_string, sizeof(flags_string), "0x%08x", exception_flags);
       switch (exception_code) {