Update compiler-rt to work for non-v7 arm.

diff --git a/src/compiler-rt b/src/compiler-rt
index 7b97b8468f0614072cf3299fa8c51e85f609316f..62a4ca6055ad6fda8faf767b93b5736dcdfb7013 160000 (submodule)
--- a/src/compiler-rt
+++ b/src/compiler-rt
@@ -1 +1 @@
-Subproject commit 7b97b8468f0614072cf3299fa8c51e85f609316f
+Subproject commit 62a4ca6055ad6fda8faf767b93b5736dcdfb7013