Re-enable asan_recover.swift on Linux.

This depends on a fix (821a493) in
llvm-project.

rdar://problem/58702902

Author: danliew-apple

test/Sanitizers/asan_recover.swift

@@ -2,9 +2,6 @@
 // REQUIRES: asan_runtime
 // UNSUPPORTED: windows
 
-// TODO(rdar://problem/58702902) Re-enable on Linux once rdar://problem/58640751 is fixed.
-// UNSUPPORTED: OS=linux-gnu
-
 // Check with recovery instrumentation and runtime option to continue execution.
 // RUN: %target-swiftc_driver %s -target %sanitizers-target-triple -g -sanitize=address -sanitize-recover=address -import-objc-header %S/asan_interface.h -emit-ir -o %t.asan_recover.ll
 // RUN: %FileCheck -check-prefix=CHECK-IR -input-file=%t.asan_recover.ll %s