[RISC-V] Add support for AddressSanitizer on RISC-V GCC

From: shaj gcc/ * config/riscv/riscv.c (asan_shadow_offset): Implement the offset of asan shadow memory for risc-v. (asan_shadow_offset): new macro definition. libsanitizer/ * sanitizer_common/sanitizer_common.h (ModuleArch): New enumerator. (Mo

[RISC-V] Add support for AddressSanitizer on RISC-V GCC

From: cooper.joshua gcc/ * config/riscv/riscv.c (asan_shadow_offset): Implement the offset of asan shadow memory for risc-v. (asan_shadow_offset): new macro definition. libsanitizer/ * sanitizer_common/sanitizer_common.h (ModuleArch): New enumerator.