[sanitizer] Add a flag to enable/disable report colorization.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@202249 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] Fix printing of long reports to logcat on Android.

__android_log_write has an implicit message length limit.
Print one line at a time.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@202250 91177308-0d34-0410-b5e6-96231b3b80d8