Fix hardcoded path in test.

Author: VitaNuo

clang/test/Frontend/dump-deserialized-declaration-ranges.cpp

@@ -7,7 +7,7 @@
 // RUN: echo '{ \
 // RUN:  "required_ranges": [\
 // RUN:    {\
-// RUN:      "file": "/usr/local/google/home/bakalova/llvm-project/build/tools/clang/test/Frontend/Output/dump-deserialized-declaration-ranges.cpp.tmp/foo.h",\
+// RUN:      "file": "%t/foo.h",\
 // RUN:      "range": [\
 // RUN:        {\
 // RUN:          "from": {\