Add support for .ARM.exidx unwind information

.ARM.exidx/.ARM.extab sections contain unwind information used on ARM
architecture from unwinding from an exception.

Differential revision: http://reviews.llvm.org/D13245

llvm-svn: 248903
diff --git a/lldb/source/Symbol/ObjectFile.cpp b/lldb/source/Symbol/ObjectFile.cpp
index e8a963e..6afaaac 100644
--- a/lldb/source/Symbol/ObjectFile.cpp
+++ b/lldb/source/Symbol/ObjectFile.cpp
@@ -373,6 +373,8 @@
                     case eSectionTypeDWARFAppleObjC:
                         return eAddressClassDebug;
                     case eSectionTypeEHFrame:
+                    case eSectionTypeARMexidx:
+                    case eSectionTypeARMextab:
                     case eSectionTypeCompactUnwind:
                         return eAddressClassRuntime;
                     case eSectionTypeELFSymbolTable: