Restore REQUIRES: default_triple to a test

This was accidentally removed as part of 7683a08 "Remove lit
feature object-emission"

7683a08 Remove lit feature object-emission

llvm/test/DebugInfo/debuglineinfo-path.ll

@@ -3,6 +3,7 @@
 ; On powerpc llvm-nm describes win_func as a global variable, not a function. It breaks the test.
 ; It is not essential to DWARF path handling code we're testing here.
 ; UNSUPPORTED: powerpc
+; REQUIRES: default_triple
 ; RUN: %llc_dwarf -O0 -filetype=obj -o %t < %s
 ; RUN: llvm-nm --radix=o %t | grep posix_absolute_func > %t.posix_absolute_func
 ; RUN: llvm-nm --radix=o %t | grep posix_relative_func > %t.posix_relative_func