contrib/curl: update ifdef condition for MCST-LCC compiler
in mcst-lcc compiler => 1.25 added a new macro definition to determine compiler
# define CURL_SIZEOF_CURL_SOCKLEN_T 4
#elif defined(__LCC__)
-# if defined(__e2k__) /* MCST eLbrus C Compiler */
+# if defined(__MCST__) /* MCST eLbrus Compiler Collection */
# define CURL_SIZEOF_LONG 8
# define CURL_TYPEOF_CURL_OFF_T long
# define CURL_FORMAT_CURL_OFF_T "ld"
