[RISCV][sanitizer] Set SANITIZER_MMAP_RANGE_SIZE for sv57

This patch enables sanitizers for sv57 virtual memory mode.
Alloctor checks whether SANITIZER_MMAP_RANGE_SIZE matches possible mmap
regions:
sanitizer_allocator_primary32.h:292 "((res)) <((kNumPossibleRegions))"

Since SANITIZER_MMAP_RANGE_SIZE only controls "possible" mmap regions,
setting it to (1 << 57) also works for sv39 and sv48.

compiler-rt/lib/sanitizer_common/sanitizer_platform.h

@@ -322,7 +322,7 @@
 #  if SANITIZER_FUCHSIA
 #    define SANITIZER_MMAP_RANGE_SIZE (1ULL << 38)
 #  else
-#    define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
+#    define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 56)
 #  endif
 #elif defined(__aarch64__)
 #  if SANITIZER_APPLE