Move block_annotate from iomgr to support since it's used in other
core places besides iomgr
diff --git a/BUILD b/BUILD
index 69b5c32..955d224 100644
--- a/BUILD
+++ b/BUILD
@@ -44,6 +44,7 @@
 cc_library(
   name = "gpr",
   srcs = [
+    "src/core/support/block_annotate.h",
     "src/core/support/env.h",
     "src/core/support/file.h",
     "src/core/support/murmur_hash.h",
@@ -179,7 +180,6 @@
     "src/core/iomgr/alarm.h",
     "src/core/iomgr/alarm_heap.h",
     "src/core/iomgr/alarm_internal.h",
-    "src/core/iomgr/block_annotate.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
     "src/core/iomgr/fd_posix.h",
@@ -456,7 +456,6 @@
     "src/core/iomgr/alarm.h",
     "src/core/iomgr/alarm_heap.h",
     "src/core/iomgr/alarm_internal.h",
-    "src/core/iomgr/block_annotate.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
     "src/core/iomgr/fd_posix.h",
@@ -1007,6 +1006,7 @@
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
+    "src/core/support/block_annotate.h",
     "src/core/support/env.h",
     "src/core/support/file.h",
     "src/core/support/murmur_hash.h",
@@ -1229,7 +1229,6 @@
     "src/core/iomgr/alarm.h",
     "src/core/iomgr/alarm_heap.h",
     "src/core/iomgr/alarm_internal.h",
-    "src/core/iomgr/block_annotate.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
     "src/core/iomgr/fd_posix.h",