[tools] Add ninja targets that generate all generated .cc files

This adds a new target :generated_cc_files which generates all
generated .cc files and is quick to build (~5sec on my machine).

TBR=yangguo@chromium.org

Change-Id: I51485635671b55302b06f1ea300e86ef1745931e
Bug: v8:8526
Reviewed-on: https://chromium-review.googlesource.com/c/1354881
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57941}

BUILD.gn

@@ -4159,3 +4159,19 @@ v8_source_set("wasm_compile_fuzzer") {
 
 v8_fuzzer("wasm_compile_fuzzer") {
 }
+
+# Target to build all generated .cc files.
+group("v8_generated_cc_files") {
+  testonly = true
+
+  deps = [
+    ":d8_js2c",
+    ":generate_bytecode_builtins_list",
+    ":js2c",
+    ":js2c_experimental_extras",
+    ":js2c_extras",
+    ":run_torque",
+    "src/inspector:v8_generated_cc_files",
+    "test/cctest:v8_generated_cc_files",
+  ]
+}

src/inspector/BUILD.gn

@@ -137,3 +137,12 @@ v8_source_set("inspector") {
     "wasm-translation.h",
   ]
 }
+
+#Target to generate all .cc files.
+group("v8_generated_cc_files") {
+  testonly = true
+
+  deps = [
+    ":protocol_generated_sources",
+  ]
+}

test/cctest/BUILD.gn

@@ -489,3 +489,12 @@ v8_executable("generate-bytecode-expectations") {
     "//build/win:default_exe_manifest",
   ]
 }
+
+#Target to generate all .cc files.
+group("v8_generated_cc_files") {
+  testonly = true
+
+  deps = [
+    ":resources",
+  ]
+}