Runfiles not bundled with macos_application

[gkoreman]

Building a macos_application with a cc_library does not include runfiles.

cc_library(
    name = "libapp",
    srcs = ["main.cpp",],
    data = [":data.txt"],
)

macos_application(
    name = "app_macos",
    deps = [":libapp"],
)

data.txt is not packaged in the macos_application.