Android patch: Add --omitCollationRules to genrb.

This change was introduced in Android by the ICU 54.1 upgrade:

https://android.googlesource.com/platform/external/icu/+/f9878a2

Changing ICU4J test errors into warnings was introduced for ICU 55:

https://android.googlesource.com/platform/external/icu/+/0543b35

Changing ICU4C test errors into log messages is new for ICU 57.

https://android.googlesource.com/platform/external/icu/+/805390a

In ICU 64 build system has changed, migrating from Makefile to
python script when performing various data transformations, so that patch now
patches BUILDRULES.py and adds '--omitCollationRules' option there.

Test: n/a
Change-Id: Ibb68bb9152ca336f4635b85b526c46565bfb4b8a
6 files changed