Fix libchrome-host references when building on linux.

libchrome-host was renamed to libchrome in the previous CL, but the
test targets (only in linux) were incorrectly using libchrome-host
still.

Bug: 24619596
TEST=`mmma external/libchrome` on mac and linux

Change-Id: I40fc0bfe036dc5780f4ae3b21fbe91ca79803bc9
1 file changed