[committed] libstdc++: Disable "-Winvalid-specialization" for g++ coroutine tests.

These test define specializations for libstdc++ std::coroutine_handle
definition, that is marked [[_Clang::__no_specializations]] since
r17-2853-gb90df55625eb40.

gcc/testsuite/ChangeLog:

	* g++.dg/coroutines/pr105475-3.C: Add -Wno-invalid-specialization
	option.
	* g++.dg/coroutines/pr105475-broken-spec.C: Likewise.
---
 gcc/testsuite/g++.dg/coroutines/pr105475-3.C           | 1 +
 gcc/testsuite/g++.dg/coroutines/pr105475-broken-spec.C | 1 +
 2 files changed, 2 insertions(+)

diff --git a/gcc/testsuite/g++.dg/coroutines/pr105475-3.C b/gcc/testsuite/g++.dg/coroutines/pr105475-3.C
index 75e0624ad71..4a7385bbdb2 100644
--- a/gcc/testsuite/g++.dg/coroutines/pr105475-3.C
+++ b/gcc/testsuite/g++.dg/coroutines/pr105475-3.C
@@ -1,3 +1,4 @@
+// { dg-additional-options "-Wno-invalid-specialization" }
 // https://gcc.gnu.org/PR105475
 // Test the case where we create a non-static from_address.
 #include <coroutine>
diff --git a/gcc/testsuite/g++.dg/coroutines/pr105475-broken-spec.C b/gcc/testsuite/g++.dg/coroutines/pr105475-broken-spec.C
index 07bf9b06aed..c48ddc26151 100644
--- a/gcc/testsuite/g++.dg/coroutines/pr105475-broken-spec.C
+++ b/gcc/testsuite/g++.dg/coroutines/pr105475-broken-spec.C
@@ -1,3 +1,4 @@
+// { dg-additional-options "-Wno-invalid-specialization" }
 // https://gcc.gnu.org/PR105475
 // Test the case where we specialize coroutine_handle and break it.
 #include <coroutine>
-- 
2.55.0