[clang][Tooling] Move STL recognizer to its own library

As pointed out in https://reviews.llvm.org/D119130#3829816, this
introduces a clang AST dependency to the clangToolingInclusions, which is used
by clang-format.

Since rest of the inclusion tooling doesn't depend on clang ast, moving this
into a separate library.

Differential Revision: https://reviews.llvm.org/D135245

clang-tools-extra/clangd/CMakeLists.txt

@@ -160,6 +160,7 @@ clang_target_link_libraries(clangDaemon
   clangTooling
   clangToolingCore
   clangToolingInclusions
+  clangToolingInclusionsStdlib
   clangToolingSyntax
   )
 

clang/lib/Tooling/Inclusions/CMakeLists.txt

@@ -3,12 +3,12 @@ set(LLVM_LINK_COMPONENTS support)
 add_clang_library(clangToolingInclusions
   HeaderIncludes.cpp
   IncludeStyle.cpp
-  StandardLibrary.cpp
 
   LINK_LIBS
-  clangAST
   clangBasic
   clangLex
   clangRewrite
   clangToolingCore
   )
+
+  add_subdirectory(Stdlib)

clang/lib/Tooling/Inclusions/Stdlib/CMakeLists.txt

@@ -0,0 +1,6 @@
+add_clang_library(clangToolingInclusionsStdlib
+  StandardLibrary.cpp
+
+  LINK_LIBS
+  clangAST
+  )

clang/unittests/Tooling/CMakeLists.txt

@@ -81,6 +81,7 @@ clang_target_link_libraries(ToolingTests
   clangTooling
   clangToolingCore
   clangToolingInclusions
+  clangToolingInclusionsStdlib
   clangToolingRefactoring
   clangTransformer
   )