Update rpath linux test to support (RPATH) and (RUNPATH)

apple/swift-llvm@7042da0

Author: shahmishal

test-snapshot-binaries/test-rpath-linux-repl.py

@@ -1,4 +1,4 @@
 # Tests that DT_RPATH is correct for the dummy repl executable on Linux.
 # REQUIRES: platform=Linux
 # RUN: %{readelf} -d %{repl_swift} | %{FileCheck} %s
-# CHECK: {{.*}} {{RPATH|RUNPATH}} {{.*}}$ORIGIN/../lib/swift/linux
+# CHECK: {{.*}} {{\(RPATH\)|\(RUNPATH\)}} {{.*}}$ORIGIN/../lib/swift/linux