Tell Glean which db to look for Swift

Summary:
In order to map requests from Swift files properly, add 'fbsource.swift' for the Glean DB Repository mapping. Although we don't have a Prod db, it will be needed for local testing.

Next:
need to figure out why it shows `UNSUPPORTED_LANGUAGE` in the result.

Reviewed By: Wilfred

Differential Revision: D71232210

fbshipit-source-id: 03bd9f61da45f1bed6a6e192a4c914b556d648a6

Author: zihej

Diff for: glean/glass/Glean/Glass/RepoMapping.hs

@@ -54,6 +54,7 @@ gleanIndices_ = Map.fromList
       ,("test", Language_TypeScript)
       ,("test", Language_Rust)
       ,("test", Language_Java)
+      ,("test", Language_Swift)
       ])
   ]
 

Diff for: glean/glass/Glean/Glass/Repos.hs

@@ -249,6 +249,7 @@ filetype (Path file)
   | is ".thrift"  = Just Language_Thrift
 
   | is ".rs"  = Just Language_Rust
+  | is ".swift"  = Just Language_Swift
   | is ".erl"  = Just Language_Erlang
   | is ".go"  = Just Language_Go
   | is ".ts"  = Just Language_TypeScript

Diff for: glean/glass/Glean/Glass/SymbolId.hs

@@ -192,6 +192,7 @@ shortCodeTable =
   , (Language_PreProcessor , "pp")
   , (Language_Python, "py")
   , (Language_Rust , "rs")
+  , (Language_Swift , "swift")
   , (Language_Thrift , "thrift")
   , (Language_TypeScript , "ts")
   ]