Fuchsia: Build standalone VM. Make it run "Hello, World!".

runtime/bin/builtin_impl_sources.gypi

Index: runtime/bin/builtin_impl_sources.gypi
diff --git a/runtime/bin/builtin_impl_sources.gypi b/runtime/bin/builtin_impl_sources.gypi
index 0de2c228b17e75aff6477eeb31c71353fe93ede3..2e6ae0c0537adad5a4a28e8ee24e1eb3080c7fe8 100644
--- a/runtime/bin/builtin_impl_sources.gypi
+++ b/runtime/bin/builtin_impl_sources.gypi
@@ -10,6 +10,7 @@
     'crypto.cc',
     'crypto.h',
     'crypto_android.cc',
+    'crypto_fuchsia.cc',
     'crypto_linux.cc',
     'crypto_macos.cc',
     'crypto_win.cc',
@@ -19,6 +20,7 @@
     'directory.cc',
     'directory.h',
     'directory_android.cc',
+    'directory_fuchsia.cc',
     'directory_linux.cc',
     'directory_macos.cc',
     'directory_unsupported.cc',
@@ -27,6 +29,7 @@
     'extensions.h',
     'extensions.cc',
     'extensions_android.cc',
+    'extensions_fuchsia.cc',
     'extensions_linux.cc',
     'extensions_macos.cc',
     'extensions_win.cc',
@@ -37,6 +40,7 @@
     'file.cc',
     'file.h',
     'file_android.cc',
+    'file_fuchsia.cc',
     'file_linux.cc',
     'file_macos.cc',
     'file_support.cc',
@@ -63,6 +67,7 @@
     'thread_win.h',
     'utils.h',
     'utils_android.cc',
+    'utils_fuchsia.cc',
     'utils_linux.cc',
     'utils_macos.cc',
     'utils_win.cc',