Fix compilation warning in compiler-rt.

error: width of bit-field 'allocated' (8 bits) exceeds the width of
its type; value will be truncated to 1 bit [-Werror,-Wbitfield-width]

llvm-svn: 247840
diff --git a/compiler-rt/lib/lsan/lsan_allocator.cc b/compiler-rt/lib/lsan/lsan_allocator.cc
index 67125db..5611a3b 100644
--- a/compiler-rt/lib/lsan/lsan_allocator.cc
+++ b/compiler-rt/lib/lsan/lsan_allocator.cc
@@ -26,7 +26,7 @@
 namespace __lsan {
 
 struct ChunkMetadata {
-  bool allocated : 8;  // Must be first.
+  u8 allocated : 8;  // Must be first.
   ChunkTag tag : 2;
   uptr requested_size : 54;
   u32 stack_trace_id;