x86: Fix some style issues in stacktrace.cc.

De-indent the X86ISA namespace, and wrap some overly long lines.

Change-Id: I01a6b66a1cf721e16e4ed4dd1c3469ee112e9177
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18368
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed