[JITLink] [test] Generalize UNSUPPORTED markings for Windows/arm64 (llvm#142377)

Don't needlessly specify the vendor field as "pc"; in MinGW
configurations, the vendor field is often "w64".

Author: mstorsjo

llvm/test/ExecutionEngine/JITLink/Generic/all-load-multifile-archive-with-duplicate-member-filenames.test

@@ -8,7 +8,7 @@
 # RUN:     | FileCheck %s
 #
 # FIXME: Enable this test on Windows/arm64 once that backend is available.
-# UNSUPPORTED: target=aarch64-pc-windows-{{.*}}
+# UNSUPPORTED: target=aarch64-{{.*}}-windows-{{.*}}
 #
 # On MinGW targets, when compiling the main() function, it gets
 # an implicitly generated call to __main(), which is missing in

llvm/test/ExecutionEngine/JITLink/Generic/all-load-multifile-archive.test

@@ -7,7 +7,7 @@
 # RUN:     | FileCheck %s
 #
 # FIXME: Enable this test on Windows/arm64 once that backend is available.
-# UNSUPPORTED: target=aarch64-pc-windows-{{.*}}
+# UNSUPPORTED: target=aarch64-{{.*}}-windows-{{.*}}
 #
 # On MinGW targets, when compiling the main() function, it gets
 # an implicitly generated call to __main(), which is missing in

llvm/test/ExecutionEngine/JITLink/Generic/sectcreate.test

@@ -6,7 +6,7 @@
 # Use -sectcreate to create a section from a data file.
 
 # Jitlink does not support ARM64 COFF files.
-# UNSUPPORTED: target=aarch64-pc-windows-{{.*}}
+# UNSUPPORTED: target=aarch64-{{.*}}-windows-{{.*}}
 
 # On MinGW targets, when compiling the main() function, it gets
 # an implicitly generated call to __main(), which is missing in