Build 32-bit ARM assembler with -mno-restrict-it.

We're not going to change this code, ARM's not going to break it.
Silence the warnings.

Bug: http://b/114120867
Test: treehugger
Change-Id: Ie25ef44706c952efc5d54012391bee19af095818
diff --git a/libc/Android.bp b/libc/Android.bp
index 7d08365..bb32d0a 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -754,6 +754,7 @@
 
     arch: {
         arm: {
+            asflags: libc_common_flags + ["-mno-restrict-it"],
             srcs: [
                 "arch-arm/generic/bionic/memcmp.S",
                 "arch-arm/generic/bionic/memmove.S",