sandbox: Remove a TEXTREL on Linux ARM.

sandbox/linux/seccomp-bpf/syscall.cc

Index: sandbox/linux/seccomp-bpf/syscall.cc
diff --git a/sandbox/linux/seccomp-bpf/syscall.cc b/sandbox/linux/seccomp-bpf/syscall.cc
index acf207dc14c4511f91939d9077981f01732b70fd..ab125ff647e77bf72c17e7840e7449302d4541d2 100644
--- a/sandbox/linux/seccomp-bpf/syscall.cc
+++ b/sandbox/linux/seccomp-bpf/syscall.cc
@@ -143,7 +143,7 @@ namespace sandbox {
             // used as a marker that BPF code inspects.
             "cmp r0, #0\n"
             "bge 1f\n"
-            "ldr r0, =2f\n"
+            "adr r0, 2f\n"
             "b   2f\n"
             // We declared (almost) all clobbered registers to the compiler. On
             // ARM there is no particular register pressure. So, we can go