[asan][test] Fix build errors in loongarch64
- Add get_bits_for_arch for loongarch64 detection, fix the following error,
```
$ make check-asan
-- sanitizer_common tests on "Linux" will run against "asan"
CMake Error at test/asan/CMakeLists.txt:22 (message):
Unknown target architecture: loongarch64
Call Stack (most recent call first):
test/asan/CMakeLists.txt:49 (get_bits_for_arch)
```
- Do not use __builtin_longjmp, fix the following error,
```
llvm-project/compiler-rt/lib/asan/tests/asan_test.cpp:635:3: error: __builtin_longjmp is not supported for the current target
__builtin_longjmp((void**)buf, 1);
```
Differential Revision: https://reviews.llvm.org/D137012
GitOrigin-RevId: 867ff7c994b4b891c8d92f0dff6bac70f9d9dcf4
2 files changed
