CRASH on reset on ARM

On ARM, large applications tend to crash on reset. I've been running them with -no_enable_reset to work around this, but we should solve it as it probably indicates problems in translation which will affect faults and not just reset.

E.g., on content_shell DRT:

<proactive reset @ 101870 fragments>
<(1+x) Handling our fault in a TRY at 0x2a1f93ca>
<Application /home/derek/chromium/Release/content_shell (8173).  DynamoRIO internal crash at PC 0x00000000.  Please report this at http://dynamorio.org/issues/.  Program aborted.
Received SIGSEGV at pc 0x00000000 in thread 8174
Base: 0x2a000000
Registers:  r0 =0xfffffffc r1 =0x2c3d8c00 r2 =0x00000020 r3 =0xffffffff
        r4 =0x2c2202c0 r5 =0x2c3d8c00 r6 =0x2c24b400 r7 =0x000000fc
        r8 =0x2c24b400 r9 =0x2c2e4c60
version 5.0.16514, custom build
-checklevel 0 -code_api -stack_size 56K -max_elide_jmp 0 -max_elide_call 0 -early_inject -no_inline_ignored_syscalls -native_exec_default_list '' -no_native_exec_managed_code -no_indcall2direct 
0x2c24b7a8 0x00037340>
#CRASHED - renderer (pid 8173)