Roll ICU to 5005010

5005010 Update IANA timezone db to 2019c
181ac4d Add "# COMPONENT" to icu OWNERS file
72f4754 Fix v8 formatRange/formatRange issues
93a34f0 Add assets and copy target for extra ICU data file
2ecd66c Remove a few TODO(GYP)s that look obsolete.
948aa59 Cherry-pick "Do not override clang compiler internal builtins" in ICU
845fee7 Cherry-pick "Remove obsolete U_HAVE_STD_ATOMICS and similar @internal macros." in ICU

Change-Id: Ie64355f47e9b1f24fc164a2d14d42d876b66aabf