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/cmDependsFortran.cxx b/Source/cmDependsFortran.cxx
index dbea15a..a04cee7 100644
--- a/Source/cmDependsFortran.cxx
+++ b/Source/cmDependsFortran.cxx
@@ -178,7 +178,7 @@ bool cmDependsFortran::Finalize(std::ostream& makeDepends,
   // Store the list of modules provided by this target.
   std::string fiName = this->TargetDirectory;
   fiName += "/fortran.internal";
-  cmGeneratedFileStream fiStream(fiName.c_str());
+  cmGeneratedFileStream fiStream(fiName);
   fiStream << "# The fortran modules provided by this target.\n";
   fiStream << "provides\n";
   std::set<std::string> const& provides = this->Internal->TargetProvides;
@@ -190,7 +190,7 @@ bool cmDependsFortran::Finalize(std::ostream& makeDepends,
   if (!provides.empty()) {
     std::string fcName = this->TargetDirectory;
     fcName += "/cmake_clean_Fortran.cmake";
-    cmGeneratedFileStream fcStream(fcName.c_str());
+    cmGeneratedFileStream fcStream(fcName);
     fcStream << "# Remove fortran modules provided by this target.\n";
     fcStream << "FILE(REMOVE";
     std::string currentBinDir =