[NFC][libc++][test] loosen XFAIL condition for setfill_wchar_max.pass…

….cpp

Summary:
So we can also match aarch64 triples which have four components instead of three when disabling the test, which the case on some buildbots.

Follow on to #89305

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Differential Revision: https://phabricator.intern.facebook.com/D60250935

libcxx/test/std/input.output/iostream.format/std.manip/setfill_wchar_max.pass.cpp

@@ -15,8 +15,8 @@
 // version 2 implementation fixes the problem.
 
 // XFAIL: target={{.*}}-windows{{.*}} && libcpp-abi-version=1
-// XFAIL: target=armv{{7|8}}l-linux-gnueabihf && libcpp-abi-version=1
-// XFAIL: target=aarch64-linux-gnu && libcpp-abi-version=1
+// XFAIL: target=armv{{7|8}}l{{.*}}-linux-gnueabihf && libcpp-abi-version=1
+// XFAIL: target=aarch64{{.*}}-linux-gnu && libcpp-abi-version=1
 
 #include <iomanip>
 #include <ostream>