ART: Bump image version

Bug: 26687569
Bug: 64692057
Bug: 76420366
Test: m
Change-Id: I3e67e750d99362accfc8cb35a19510638b217907
diff --git a/runtime/image.cc b/runtime/image.cc
index 5af3e54..f147078 100644
--- a/runtime/image.cc
+++ b/runtime/image.cc
@@ -26,7 +26,7 @@
 namespace art {
 
 const uint8_t ImageHeader::kImageMagic[] = { 'a', 'r', 't', '\n' };
-const uint8_t ImageHeader::kImageVersion[] = { '0', '5', '7', '\0' };  // R^2 Bitstring type check.
+const uint8_t ImageHeader::kImageVersion[] = { '0', '5', '8', '\0' };  // R^3 Bitstring type check.
 
 ImageHeader::ImageHeader(uint32_t image_begin,
                          uint32_t image_size,