Add apt package to --run-bootstrap

Bug: 217952161
Test: Bootstrap complains when libc++abi-dev doesn't exist
Tag: #floss
Change-Id: I091340718127050046c1932131f7b87c57927680
diff --git a/build.py b/build.py
index 0bdbd16..828ba99 100755
--- a/build.py
+++ b/build.py
@@ -99,6 +99,7 @@
     'generate-ninja',
     'gnupg',
     'gperf',
+    'libc++abi-dev',
     'libc++-dev',
     'libdbus-1-dev',
     'libevent-dev',