[scudo] Make MTE inline asm compatible with GNU assembler

The GNU assembler can't parse `.arch_extension ...` before a `;`.
So instead uniformly use raw string syntax with separate lines
instead of `;` separators in the assembly code.

Reviewed By: pcc

Differential Revision: https://reviews.llvm.org/D100413

GitOrigin-RevId: 5c500c9f01aacc0d921db99681c3dc9c4078938c
1 file changed