Fix linker errors when skia_ios target is used a dependency of an iOS app.

public.bzl

 ################################################################################
 # Skylark macros
 ################################################################################
 
 is_bazel = not hasattr(native, "genmpm")
 
 def portable_select(select_dict, bazel_condition, default_condition):
   """Replaces select() with a Bazel-friendly wrapper.
 
   Args:
@@ skipping 198 matching lines @@
     ],
 )
 
 # Platform-dependent SRCS for google3-default iOS.
 BASE_SRCS_IOS = struct(
     include = [
         "src/opts/**/*.cpp",
         "src/opts/**/*.h",
         "src/ports/**/*.cpp",
         "src/ports/**/*.h",
+        "src/utils/mac/*.cpp",
     ],
     exclude = [
         "src/opts/*mips*",
         "src/opts/*NEON*",
         "src/opts/*neon*",
         "src/opts/*SSE2*",
         "src/opts/*SSSE3*",
         "src/opts/*ssse3*",
         "src/opts/*SSE4*",
         "src/opts/*sse4*",
         "src/opts/*avx*",
         "src/opts/*x86*",
         "src/opts/SkBitmapProcState_opts_none.cpp",
         "src/opts/SkBlitMask_opts_arm*.cpp",
         "src/opts/SkBlitRow_opts_arm*.cpp",
         "src/ports/*android*",
         "src/ports/*chromium*",
         "src/ports/*fontconfig*",
         "src/ports/*FontConfig*",
         "src/ports/*FreeType*",
         "src/ports/*mozalloc*",
         "src/ports/*nacl*",
         "src/ports/*win*",
-        "src/ports/SkDebug_stdio.cpp",
         "src/ports/SkFontMgr_custom.cpp",
         "src/ports/SkFontConfigInterface_direct_factory.cpp",
         "src/ports/SkFontConfigInterface_direct_google3_factory.cpp",
         "src/ports/SkFontMgr_custom_directory_factory.cpp",
         "src/ports/SkFontMgr_custom_embedded_factory.cpp",
         "src/ports/SkFontMgr_empty_factory.cpp",
         "src/ports/SkImageDecoder_CG.cpp",
         "src/ports/SkImageDecoder_WIC.cpp",
-        "src/ports/SkImageDecoder_empty.cpp",
         "src/ports/SkImageGenerator_none.cpp",
         "src/ports/SkTLS_none.cpp",
     ],
 )
 
 ################################################################################
 ## SSSE3/SSE4/AVX/AVX2 SRCS
 ################################################################################
 
 SSSE3_SRCS = struct(
@@ skipping 249 matching lines @@
 
 LINKOPTS_ANDROID = [
     "-lEGL",
 ]
 
 LINKOPTS_IOS = []
 
 LINKOPTS_ALL = [
     "-ldl",
 ]