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

Disable symbolize_test, which fails to link on amd64 where ld.lld
defaults to --exec-only.

Index: absl/debugging/CMakeLists.txt
--- absl/debugging/CMakeLists.txt.orig
+++ absl/debugging/CMakeLists.txt
@@ -89,6 +89,7 @@ absl_cc_library(
   PUBLIC
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_test(
   NAME
     symbolize_test
@@ -110,6 +111,7 @@ absl_cc_test(
     absl::strings
     GTest::gmock
 )
+endif()
 
 # Internal-only target, do not depend on directly.
 absl_cc_library(
@@ -220,6 +222,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_library(
   NAME
     leak_check
@@ -249,6 +252,7 @@ absl_cc_test(
     absl::base
     GTest::gmock_main
 )
+endif()
 
 # Internal-only target, do not depend on directly.
 absl_cc_library(
@@ -267,6 +271,7 @@ absl_cc_library(
   TESTONLY
 )
 
+if (NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
 absl_cc_test(
   NAME
     stack_consumption_test
@@ -292,3 +297,4 @@ absl_cc_library(
     absl::leak_check
   PUBLIC
 )
+endif()
