Added llvm 12.0.0

cmake_modules/FindLibClang.cmake

@@ -14,7 +14,8 @@
 #               Known LLVM release numbers.
 
 # most recent versions come first
-set(LIBCLANG_KNOWN_LLVM_VERSIONS 11.0.1
+set(LIBCLANG_KNOWN_LLVM_VERSIONS 12.0.0 12.0 12
+  11.0.1
   11.0.0 11.0 11
   10.0.1
   10.0.0 10.0 10
@@ -86,7 +87,7 @@ endforeach()
 find_path(LIBCLANG_INCLUDE_DIR clang-c/Index.h
   PATHS ${libclang_llvm_header_search_paths}
   PATH_SUFFIXES LLVM/include #Windows package from http://llvm.org/releases/
-    llvm110/include llvm100/include llvm90/include llvm80/include llvm71/include llvm70/include llvm60/include llvm50/include llvm41/include llvm40/include llvm39/include llvm38/include llvm37/include llvm36/include # FreeBSD
+    llvm120/include llvm110/include llvm100/include llvm90/include llvm80/include llvm71/include llvm70/include llvm60/include llvm50/include llvm41/include llvm40/include llvm39/include llvm38/include llvm37/include llvm36/include # FreeBSD
   DOC "The path to the directory that contains clang-c/Index.h")
 
 # On Windows with MSVC, the import library uses the ".imp" file extension
@@ -100,7 +101,7 @@ endif()
 find_library(LIBCLANG_LIBRARY NAMES libclang.imp libclang clang
   PATHS ${libclang_llvm_lib_search_paths}
   PATH_SUFFIXES LLVM/lib #Windows package from http://llvm.org/releases/
-    llvm110/lib llvm100/lib llvm90/lib llvm80/lib llvm71/lib llvm70/lib llvm60/lib llvm50/lib llvm41/lib llvm40/lib llvm39/lib llvm38/lib llvm37/lib llvm36/lib # FreeBSD
+    llvm120/lib llvm110/lib llvm100/lib llvm90/lib llvm80/lib llvm71/lib llvm70/lib llvm60/lib llvm50/lib llvm41/lib llvm40/lib llvm39/lib llvm38/lib llvm37/lib llvm36/lib # FreeBSD
   DOC "The file that corresponds to the libclang library.")
 
 get_filename_component(LIBCLANG_LIBRARY_DIR ${LIBCLANG_LIBRARY} PATH)