Merge cherrypicks of [16093381] into sc-qpr1-release.

Change-Id: I2045dd5cfdc76b61e1989fa0e2d238c5e6affc91
diff --git a/runtime/jit/jit_memory_region.cc b/runtime/jit/jit_memory_region.cc
index b0699c4..56407f5 100644
--- a/runtime/jit/jit_memory_region.cc
+++ b/runtime/jit/jit_memory_region.cc
@@ -556,7 +556,7 @@
       return false;
     }
   } else {
-    palette_status_t status = PaletteAshmemSetProtRegion(fd, PROT_READ);
+    palette_status_t status = PaletteAshmemSetProtRegion(fd, PROT_READ | PROT_EXEC);
     if (status != PALETTE_STATUS_OK) {
       CHECK_EQ(status, PALETTE_STATUS_CHECK_ERRNO);
       std::ostringstream oss;