Use standard arm assembly syntax.

The output from gcc before and after this change,
and from llvm are identical, except the ADRL to ADR change.

In this case, old "ADRL r8, Table" is translated into
       add r8, pc, #1184   ; 0x4a0
       nop         ; (mov r0, r0)
and new "ADR r8, Table; NOP" is translated into equivalent:
       add r8, pc, #1184   ; 0x4a0
       nop         {0}

BUG: 21169627

Change-Id: I64130e99f6506494b9c4a6e0f1f850491d481242