Support to generate inline long to FP bytecodes for x86

long-to-float and long-to-double are now generated inline instead of calling
a helper routine. The conversion is done by using x87.

Change-Id: I196e526afec1be212898baceca8527549c3655b6
Signed-off-by: Razvan A Lupusoru <razvan.a.lupusoru@intel.com>