[gn build] Port deab049

Author: pcc

llvm/utils/gn/secondary/llvm/lib/CAS/BUILD.gn

@@ -1,6 +1,8 @@
 static_library("CAS") {
   output_name = "LLVMCAS"
   sources = [
+    "ActionCache.cpp",
+    "ActionCaches.cpp",
     "BuiltinCAS.cpp",
     "InMemoryCAS.cpp",
     "ObjectStore.cpp",

llvm/utils/gn/secondary/llvm/unittests/CAS/BUILD.gn

@@ -7,6 +7,7 @@ unittest("CASTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    "ActionCacheTest.cpp",
     "CASTestConfig.cpp",
     "ObjectStoreTest.cpp",
   ]