Check processes for using deleted shared libraries

Shared libraries can be replaced by an upgrade, highlight processes
using deleted shared libraries.

Link with highlightDeletedExe setting, enabled by default.

Currently only checked on Linux.

Process.h

@@ -163,6 +163,9 @@ typedef struct Process_ {
    /* Tells if the executable has been replaced in the filesystem since start */
    bool procExeDeleted;
 
+   /* Tells if the process uses replaced shared libraries since start */
+   bool usesDeletedLib;
+
    /* CPU number last executed on */
    int processor;