patch 9.0.1872: CI: test_crash() fails on CI

Problem:  CI: test_crash() fails on CI
Solution: Skip test on BSD

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_crash.vim b/src/testdir/test_crash.vim
index 781f810..e0884e5 100644
--- a/src/testdir/test_crash.vim
+++ b/src/testdir/test_crash.vim
@@ -5,6 +5,8 @@
 CheckScreendump
 
 func Test_crash1()
+  CheckNotBSD
+
   if !executable('sh')
     throw 'Skipped: sh not executable!'
   endif