build: fix missing fp16 dependency in d8 builds

PR-URL: #56266
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: joyeecheung

tools/v8_gypfiles/d8.gyp

@@ -21,6 +21,7 @@
         'v8.gyp:v8_libplatform',
         'v8.gyp:generate_bytecode_builtins_list',
         'v8.gyp:v8_abseil',
+        'v8.gyp:fp16',
       ],
       # Generated source files need this explicitly:
       'include_dirs+': [