ART: add exynos-m1 to a53 #835769 & #843419 erratum exception list

Exynos-M1 is custom-designed 64-bit ARM CPU and does not need this A53
erratum handling.

Bug: 28412250
Signed-off-by: Junmo Park <junmoz.park@samsung.com>

(cherry picked from commit 2bd7d2d6d92daa796ee33e70bb788d3dae1f2fc9)

Change-Id: Id460e4e98baafeed1cf3540cec754b30044cda11
diff --git a/runtime/arch/arm64/instruction_set_features_arm64.cc b/runtime/arch/arm64/instruction_set_features_arm64.cc
index 613bb5c..cad13b2 100644
--- a/runtime/arch/arm64/instruction_set_features_arm64.cc
+++ b/runtime/arch/arm64/instruction_set_features_arm64.cc
@@ -39,7 +39,7 @@
   if (!needs_a53_835769_fix) {
     // Check to see if this is an expected variant.
     static const char* arm64_known_variants[] = {
-        "denver64", "kryo"
+        "denver64", "kryo", "exynos-m1"
     };
     if (!FindVariantInArray(arm64_known_variants, arraysize(arm64_known_variants), variant)) {
       std::ostringstream os;