Export no sanitize link runtime flag

Bug: 294219797
Test: Unit tests
Change-Id: Id4bbf78e9ba3893fb857b85e6b7261b11404ebf0

cc/sanitize.go

@@ -91,6 +91,8 @@ var (
 
 	hostOnlySanitizeFlags   = []string{"-fno-sanitize-recover=all"}
 	deviceOnlySanitizeFlags = []string{"-fsanitize-trap=all", "-ftrap-function=abort"}
+
+	noSanitizeLinkRuntimeFlag = "-fno-sanitize-link-runtime"
 )
 
 type SanitizerType int
@@ -426,6 +428,8 @@ func init() {
 	exportedVars.ExportString("CfiExportsMapFilename", cfiExportsMapFilename)
 	exportedVars.ExportString("CfiAssemblySupportFlag", cfiAssemblySupportFlag)
 
+	exportedVars.ExportString("NoSanitizeLinkRuntimeFlag", noSanitizeLinkRuntimeFlag)
+
 	android.RegisterMakeVarsProvider(pctx, cfiMakeVarsProvider)
 	android.RegisterMakeVarsProvider(pctx, hwasanMakeVarsProvider)
 }
@@ -927,7 +931,7 @@ func (s *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
 			// Bionic and musl sanitizer runtimes have already been added as dependencies so that
 			// the right variant of the runtime will be used (with the "-android" or "-musl"
 			// suffixes), so don't let clang the runtime library.
-			flags.Local.LdFlags = append(flags.Local.LdFlags, "-fno-sanitize-link-runtime")
+			flags.Local.LdFlags = append(flags.Local.LdFlags, noSanitizeLinkRuntimeFlag)
 		} else {
 			// Host sanitizers only link symbols in the final executable, so
 			// there will always be undefined symbols in intermediate libraries.