Android patch: Allow absolute paths for ctest's -x.

ctest incorrectly identifies absolute paths to -x as a test filter.
Skip the argument after -x when finding tese filters so absolute paths
are usable.

The upstream request is tracked at
https://unicode-org.atlassian.net/browse/ICU-13849.

Bug: 120776993
Test: treehugger
Change-Id: I93b8f190970e257c04dfb6c33900e1c40819ec9f
1 file changed