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: Iedb6f32368dd8e4d9f75f2a829486e4a27507946
1 file changed