[clang][deps] Fix failing modules.cpp test

Commit d8bab69ead updated the ClangScanDeps/modules.cpp test. The new `{{.*}}` regex is supposed to only match `modules_cdb_input.o`, `a.o` or `b.o`. However, due to non-determinism, this can sometimes also match `modules_cdb_input2.o`, causing match failure on the next line. This commit changes the regex to only match one of the three valid cases.

Buildbot failure: https://lab.llvm.org/buildbot/#/builders/109/builds/16675

clang/test/ClangScanDeps/modules.cpp

@@ -48,7 +48,7 @@
 // CHECK1-NEXT: Inputs{{/|\\}}header2.h
 // CHECK1: Inputs{{/|\\}}header.h
 
-// CHECK2: {{.*}}.o:
+// CHECK2: {{(modules_cdb_input)|(a)|(b)}}.o:
 // CHECK2-NEXT: modules_cdb_input.cpp
 // CHECK2-NEXT: Inputs{{/|\\}}module.modulemap
 // CHECK2-NEXT: Inputs{{/|\\}}header.h