Disable prctl test when building for arm or riscv

Author: amykhuang

libc/test/src/sys/prctl/linux/CMakeLists.txt

@@ -1,5 +1,10 @@
 add_custom_target(libc_sys_prctl_unittests)
 
+# Temporarily disable this test while setting up arm and riscv buildbots
+# using qemu, since PR_GET_THP_DISABLE is not supported on qemu.
+if (NOT (LIBC_TARGET_ARCHITECTURE_IS_ARM OR
+	 LIBC_TARGET_ARCHITECTURE_IS_RISCV32 OR
+	 LIBC_TARGET_ARCHITECTURE_IS_RISCV64))
 add_libc_unittest(
   prctl_test
   SUITE
@@ -13,3 +18,4 @@ add_libc_unittest(
     libc.test.UnitTest.ErrnoCheckingTest
     libc.test.UnitTest.ErrnoSetterMatcher
 )
+endif()