Add boolean keywords

Summary: Add 'true' and 'false' keywords to vim thrift syntax file.

Reviewed By: createdbysk

Differential Revision: D67864429

fbshipit-source-id: 7e3702d14a4fe753ac75ddf9a84a9438257435bf

third-party/thrift/src/thrift/contrib/thrift.vim

@@ -51,6 +51,7 @@ syn region thriftString start=+'+ skip=+\\'+ end=+'+
 syn match thriftNumber "-\=\<\d\+\>" contained
 
 " Keywords
+syn keyword thriftBool true false
 syn keyword thriftKeyword namespace
 syn keyword thriftKeyword xsd_all xsd_optional xsd_nillable xsd_attrs
 syn keyword thriftKeyword include cpp_include cpp_type const optional required
@@ -85,6 +86,7 @@ if version >= 508 || !exists("did_thrift_syn_inits")
   HiLink thriftTodo Todo
   HiLink thriftString String
   HiLink thriftNumber Number
+  HiLink thriftBool Boolean
   HiLink thriftSpecial Special
   HiLink thriftStructure Structure