Fix Solaris build of ubsan.

Summary: Broken in D78325.

Reviewers: ro

Subscribers: mgorny, fedor.sergeev, #sanitizers, llvm-commits

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D78510

compiler-rt/lib/ubsan/CMakeLists.txt

@@ -214,6 +214,11 @@ else()
                                       EXTRA ubsan.syms.extra)
         set(VERSION_SCRIPT_FLAG
             -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/clang_rt.ubsan_standalone-dynamic-${arch}.vers)
+        # The Solaris 11.4 linker supports a subset of GNU ld version scripts,
+        # but requires a special option to enable it.
+        if (OS_NAME MATCHES "SunOS")
+            list(APPEND VERSION_SCRIPT_FLAG -Wl,-z,gnu-version-script-compat)
+        endif()
         set_property(SOURCE
           ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp
           APPEND PROPERTY