Fix memory leak in GetFormattedCommandLine() function (linuxDeployment.c)

Fix memory leak in GetFormattedCommandLine() function (linuxDeployment.c)

1. There are malloc() calls happening in a loop; this function returns
   NULL when one of malloc fails.  If a malloc call fails in the loop,
   all memory allocated in previous iterations should be freed before
   the return NULL.
2. Clear allocated resources before return NULL in this file.
3. Add NULL check following malloc calls in this file.
4. Encapsulate %s in () only if %s is strerror(errno), otherwise encapsulate
   %s in single quotes.
5. End with \n in sLog.