[gn] port e235fcb (bolt TargetConfig.def)

Author: nico

llvm/utils/gn/secondary/bolt/include/bolt/Core/BUILD.gn

@@ -0,0 +1,6 @@
+import("//llvm/lib/Target/write_target_def_file.gni")
+
+write_target_def_file("TargetConfig.def") {
+  key = "BOLT_ENUM_TARGETS"
+  value = "BOLT_TARGET"
+}

llvm/utils/gn/secondary/bolt/tools/driver/BUILD.gn

@@ -23,6 +23,7 @@ group("symlinks") {
 executable("llvm-bolt") {
   configs += [ "//llvm/utils/gn/build:bolt_code" ]
   deps = [
+    "//bolt/include/bolt/Core:TargetConfig.def",
     "//bolt/lib/Profile",
     "//bolt/lib/Rewrite",
     "//bolt/lib/Utils",

llvm/utils/gn/secondary/bolt/tools/heatmap/BUILD.gn

@@ -1,6 +1,7 @@
 executable("llvm-bolt-heatmap") {
   configs += [ "//llvm/utils/gn/build:bolt_code" ]
   deps = [
+    "//bolt/include/bolt/Core:TargetConfig.def",
     "//bolt/lib/Profile",
     "//bolt/lib/Rewrite",
     "//bolt/lib/Utils",

llvm/utils/gn/secondary/bolt/unittests/Core/BUILD.gn

@@ -4,6 +4,7 @@ import("//third-party/unittest/unittest.gni")
 unittest("CoreTests") {
   configs += [ "//llvm/utils/gn/build:bolt_code" ]
   deps = [
+    "//bolt/include/bolt/Core:TargetConfig.def",
     "//bolt/lib/Core",
     "//bolt/lib/Rewrite",
     "//bolt/lib/Profile",