GCN: Properly switch sections in 'gcn_hsa_declare_function_name' [PR119737]

There are GCN/C++ target as well as offloading codes, where the hard-coded
section names in 'gcn_hsa_declare_function_name' do not fit, and assembly thus
fails:

    LLVM ERROR: Size expression must be absolute.

This commit progresses GCN target:

    [-FAIL: g++.dg/init/call1.C  -std=gnu++17 (internal compiler error: Aborted signal terminated program as)-]
    [-FAIL:-]{+PASS:+} g++.dg/init/call1.C  -std=gnu++17 (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} g++.dg/init/call1.C  -std=gnu++17 [-compilation failed to produce executable-]{+execution test+}
    [-FAIL: g++.dg/init/call1.C  -std=gnu++26 (internal compiler error: Aborted signal terminated program as)-]
    [-FAIL:-]{+PASS:+} g++.dg/init/call1.C  -std=gnu++26 (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} g++.dg/init/call1.C  -std=gnu++26 [-compilation failed to produce executable-]{+execution test+}
    UNSUPPORTED: g++.dg/init/call1.C  -std=gnu++98: exception handling not supported

..., and GCN offloading:

    [-XFAIL: libgomp.c++/target-exceptions-throw-1.C (internal compiler error: Aborted signal terminated program as)-]
    [-XFAIL: libgomp.c++/target-exceptions-throw-1.C PR119737 at line 7 (test for bogus messages, line )-]
    [-XFAIL:-]{+PASS:+} libgomp.c++/target-exceptions-throw-1.C (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} libgomp.c++/target-exceptions-throw-1.C [-compilation failed to produce executable-]{+execution test+}
    {+PASS: libgomp.c++/target-exceptions-throw-1.C output pattern test+}

    [-XFAIL: libgomp.c++/target-exceptions-throw-2.C (internal compiler error: Aborted signal terminated program as)-]
    [-XFAIL: libgomp.c++/target-exceptions-throw-2.C PR119737 at line 7 (test for bogus messages, line )-]
    [-XFAIL:-]{+PASS:+} libgomp.c++/target-exceptions-throw-2.C (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} libgomp.c++/target-exceptions-throw-2.C [-compilation failed to produce executable-]{+execution test+}
    {+PASS: libgomp.c++/target-exceptions-throw-2.C output pattern test+}

    [-XFAIL: libgomp.oacc-c++/exceptions-throw-1.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  (internal compiler error: Aborted signal terminated program as)-]
    [-XFAIL: libgomp.oacc-c++/exceptions-throw-1.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  PR119737 at line 7 (test for bogus messages, line )-]
    [-XFAIL:-]{+PASS:+} libgomp.oacc-c++/exceptions-throw-1.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} libgomp.oacc-c++/exceptions-throw-1.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  [-compilation failed to produce executable-]{+execution test+}
    {+PASS: libgomp.oacc-c++/exceptions-throw-1.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  output pattern test+}

    [-XFAIL: libgomp.oacc-c++/exceptions-throw-2.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  (internal compiler error: Aborted signal terminated program as)-]
    [-XFAIL: libgomp.oacc-c++/exceptions-throw-2.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  PR119737 at line 9 (test for bogus messages, line )-]
    [-XFAIL:-]{+PASS:+} libgomp.oacc-c++/exceptions-throw-2.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} libgomp.oacc-c++/exceptions-throw-2.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  [-compilation failed to produce executable-]{+execution test+}
    {+PASS: libgomp.oacc-c++/exceptions-throw-2.C -DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa  -O2  output pattern test+}

	PR target/119737
	gcc/
	* config/gcn/gcn.cc (gcn_hsa_declare_function_name): Properly
	switch sections.
	libgomp/
	* testsuite/libgomp.c++/target-exceptions-throw-1.C: Remove
	PR119737 XFAILing.
	* testsuite/libgomp.c++/target-exceptions-throw-2.C: Likewise.
	* testsuite/libgomp.oacc-c++/exceptions-throw-1.C: Likewise.
	* testsuite/libgomp.oacc-c++/exceptions-throw-2.C: Likewise.

Co-authored-by: Thomas Schwinge <tschwinge@baylibre.com>
(cherry picked from commit dfc43afe719898c3eafbed37fac7e6809d8b97ab)