Roll ICU to d7eebbfb

d7eebbfb icu: Expand is_linux to is_linux || is_chromeos.
83b2ac66 [fuchsia] Bring more changes from the Fuchsia copy
368b1cb1 Upstream Fuchsia changes in build file

Bug: 56362
Change-Id: I71013cf8c4e2da94c61a5d4c531cf2dd400b32f1