Make tests faster by not building the entire cache

Author: allsey87

bazel/test_secondary_lto_cache/BUILD

@@ -3,7 +3,10 @@ load("@emsdk//emscripten_toolchain:wasm_rules.bzl", "wasm_cc_binary")
 cc_binary(
     name = "hello-world",
     srcs = ["hello-world.cc"],
-    linkopts = ["-flto"],
+    linkopts = [
+        "-sAUTO_NATIVE_LIBRARIES=0",
+        "-flto",
+    ],
 )
 
 wasm_cc_binary(

bazel/test_secondary_lto_cache/WORKSPACE

@@ -13,7 +13,21 @@ emscripten_deps()
 
 load("@emsdk//:emscripten_cache.bzl", "emscripten_cache")
 
-emscripten_cache(flags = ["--lto"])
+emscripten_cache(
+    flags = ["--lto"],
+    libraries = [
+        "crtbegin",
+        "libprintf_long_double-debug",
+        "libstubs-debug",
+        "libnoexit",
+        "libc-debug",
+        "libdlmalloc",
+        "libcompiler_rt",
+        "libc++-noexcept",
+        "libc++abi-debug-noexcept",
+        "libsockets"
+    ]
+)
 
 load("@emsdk//:toolchains.bzl", "register_emscripten_toolchains")