[OpenMP] Don't manually strip sections in the linker wrapper

Summary:
The changes in D122987 ensures that the offloading sections always have
the SHF_EXCLUDE flag. This means that we do not need to manually strip
these sections for ELF or COFF targets.

clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp

@@ -65,7 +65,7 @@ static cl::OptionCategory
 static cl::opt<bool> StripSections(
     "strip-sections", cl::ZeroOrMore,
     cl::desc("Strip offloading sections from the host object file."),
-    cl::init(true), cl::cat(ClangLinkerWrapperCategory));
+    cl::init(false), cl::cat(ClangLinkerWrapperCategory));
 
 static cl::opt<std::string> LinkerUserPath("linker-path", cl::Required,
                                            cl::desc("Path of linker binary"),