[ARM] Fix triple format in test branch disassemble test

[avieira]

Summary

Fixing triple format in the tests added for the branch label fix for Thumb Targets.

[samparker]

Thanks Andre! The previous patch was reverted, so this can be recommitted again as part of the original patch. And lets wait until the lld test fixes are ready to land as well.

cheers,
sam

test/MC/ARM/branch-disassemble.s

-@ RUN: llvm-mc -mcpu=cortex-a9 -triple armv7.arm-none-eabi -filetype obj -o - %s \
-@ RUN:   | llvm-objdump -mcpu=cortex-a9 -triple armv7.arm-none-eabi -d - \
+@ RUN: llvm-mc -mcpu=cortex-a9 -triple armv7-arm-none-eabi -filetype obj -o - %s \
+@ RUN:   | llvm-objdump -mcpu=cortex-a9 -triple armv7-arm-none-eabi -d - \
 @ RUN:   | FileCheck %s -check-prefix CHECK-ARM
 
-@ RUN: llvm-mc -mcpu=cortex-m3 -triple thumbv7.arm-none-eabi -filetype obj -o - %s \
-@ RUN:   | llvm-objdump -mcpu=cortex-m3 -triple thumbv7.arm-none-eabi -d - \
+@ RUN: llvm-mc -mcpu=cortex-m3 -triple thumbv7m-arm-none-eabi -filetype obj -o - %s \
+@ RUN:   | llvm-objdump -mcpu=cortex-m3 -triple thumbv7m-arm-none-eabi -d - \
 @ RUN:   | FileCheck %s -check-prefix CHECK-THUMB
 
 b.w .Lbranch
 @ CHECK-ARM: b #4 <$a.0+0xC>
 @ CHECK-THUMB: b.w #8 <$t.0+0xC>
 adds r0, r1, #42
 adds r1, r2, #42
 .Lbranch:
 movs r2, r3