Fix Clang-tidy readability-redundant-string-cstr warnings

Reviewers: zturner, labath

Subscribers: tberghammer, danalbert, lldb-commits
    
Differential Revision: https://reviews.llvm.org/D26233

llvm-svn: 285855
diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
index 8e2587b..8494077 100644
--- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -2475,7 +2475,7 @@
         if (columns.size() < 6)
           return true; // continue searching
 
-        FileSpec this_file_spec(columns[5].str().c_str(), false);
+        FileSpec this_file_spec(columns[5].str(), false);
         if (this_file_spec.GetFilename() != module_file_spec.GetFilename())
           return true; // continue searching