Disable all tests that require a leak sanitizer because
OpenBSD does not support it.

Index: absl/debugging/CMakeLists.txt
--- absl/debugging/CMakeLists.txt.orig
+++ absl/debugging/CMakeLists.txt
@@ -225,6 +225,7 @@ absl_cc_library(
   PUBLIC
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_library(
   NAME
     leak_check_api_enabled_for_testing
@@ -237,6 +238,7 @@ absl_cc_library(
     $<$<BOOL:${ABSL_HAVE_LSAN}>:-DLEAK_SANITIZER>
   TESTONLY
 )
+endif()
 
 absl_cc_library(
   NAME
@@ -251,6 +253,7 @@ absl_cc_library(
   TESTONLY
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_test(
   NAME
     leak_check_test
@@ -266,6 +269,7 @@ absl_cc_test(
     absl::base
     GTest::gmock_main
 )
+endif()
 
 absl_cc_test(
   NAME
@@ -281,6 +285,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_test(
   NAME
     disabled_leak_check_test
@@ -297,6 +302,7 @@ absl_cc_test(
     absl::raw_logging_internal
     GTest::gmock_main
 )
+endif()
 
 absl_cc_library(
   NAME
