cmGeneratedFileStream: clang-tidy applied to remove redundant ``c_str`` calls

After changing the ``cmGeneratedFileStream`` methods to accept
``std::string const&`` instead of ``const char*`` we don't
need to call ``std::string::c_str`` anymore when passing
a ``std::string`` to a ``cmGeneratedFileStream`` method.

This patch removes all redundant ``std::string::c_str``
calls when passing a string to a ``cmGeneratedFileStream`` method.

It was generated by building CMake with clang-tidy enabled using
the following options:

-DCMAKE_CXX_CLANG_TIDY=/usr/bin/clang-tidy-4.0;-checks=-*,readability-redundant-string-cstr;-fix;-fix-errors

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index 7014676..78af622 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -288,7 +288,7 @@ int cmCPackGenerator::InstallProjectViaInstallCommands(
       if (!resB || retVal) {
         std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
         tmpFile += "/InstallOutput.log";
-        cmGeneratedFileStream ofs(tmpFile.c_str());
+        cmGeneratedFileStream ofs(tmpFile);
         ofs << "# Run command: " << ic << std::endl
             << "# Output:" << std::endl
             << output << std::endl;
@@ -660,7 +660,7 @@ int cmCPackGenerator::RunPreinstallTarget(
     if (!resB || retVal) {
       std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
       tmpFile += "/PreinstallOutput.log";
-      cmGeneratedFileStream ofs(tmpFile.c_str());
+      cmGeneratedFileStream ofs(tmpFile);
       ofs << "# Run command: " << buildCommand << std::endl
           << "# Directory: " << installDirectory << std::endl
           << "# Output:" << std::endl