Fix build

runtime/bin/observatory_assets_empty.cc

Index: runtime/bin/observatory_assets_empty.cc
diff --git a/runtime/bin/observatory_assets_empty.cc b/runtime/bin/observatory_assets_empty.cc
index 304ea55cecab76a6cefb5b9ab0d188e4a67f7af2..318bbf37bed03fc7d2b6008c962f5c0092402986 100644
--- a/runtime/bin/observatory_assets_empty.cc
+++ b/runtime/bin/observatory_assets_empty.cc
@@ -16,7 +16,7 @@ typedef unsigned __int8 uint8_t;
 namespace dart {
 namespace bin {
 
-static uint8_t char observatory_assets_archive_[] = { '\0' };
+static uint8_t observatory_assets_archive_[] = { '\0' };
 unsigned int observatory_assets_archive_len = 0;
 const uint8_t* observatory_assets_archive = observatory_assets_archive_;