maint: upgrade usage of deprecated posix API functions

Author: Klaim

libmamba/src/core/run.cpp

@@ -199,7 +199,7 @@ namespace mamba
         const std::vector<std::string>& command,
         LockFile proc_dir_lock [[maybe_unused]]
     )
-        : location{ proc_dir() / fmt::format("{}.json", getpid()) }
+        : location{ proc_dir() / fmt::format("{}.json", _getpid()) }
     {
         // Lock must be hold for the duraction of this constructor.
         if (is_file_locking_allowed())

libmamba/src/core/util.cpp

@@ -892,7 +892,7 @@ namespace mamba
         int ret = 0;
         if (m_fd > -1)
         {
-            ret = close(m_fd);
+            ret = _close(m_fd);
             m_fd = -1;
         }
         return ret;