www/chromium build errors on Rpi3

[bob prohaska]

In the course of yet another attempt to compile www/chromium
on an rpi3 running a fresh install of -current I noticed some 
non-fatal errors in the log file:

[16066/39753] python ../../build/gn_run_binary.py make_top_domain_list_variables ../../components/url_formatter/spoof_checks/top_domains/domains.list gen/components/url_formatter/spoof_checks/top_domains/top500-domains-inc.cc
FAILED: gen/components/url_formatter/spoof_checks/top_domains/top500-domains-inc.cc 
python ../../build/gn_run_binary.py make_top_domain_list_variables ../../components/url_formatter/spoof_checks/top_domains/domains.list gen/components/url_formatter/spoof_checks/top_domains/top500-domains-inc.cc
[0627/101804.584489:ERROR:icu_util.cc(148)] Can't find icudtl.dat
[0627/101804.621643:ERROR:icu_util.cc(241)] Invalid file descriptor to ICU data received.
Failed to create an ICU uspoof_checker due to U_FILE_ACCESS_ERROR.
make_top_domain_list_variables failed with exit code 1

I don't know if they're new, or significant, but squeaky wheels and
all that....

Thanks for reading,

bob prohaska