Fix OSS build with vendored asmjit

Summary:
The source distribution build doesn't know about asmjit's CMakeLists.txt and
fails trying to load it.

Reviewed By: mpage

Differential Revision: D99493759

fbshipit-source-id: 746d9f695cc27d1a17aa9ce1c993959a6a50c026

Author: alexmalyshev

MANIFEST.in

@@ -1,5 +1,5 @@
 include CMakeLists.txt
-recursive-include cinderx *.cpp *.c *.h
+recursive-include cinderx *.cpp *.c *.h CMakeLists.txt
 
 # Opcode directories have invalid Python package names (e.g. opcodes/3.14) so
 # they have to be included manually.