Update testsuite config to correctly launch testsuite
logging improvement for testsuite.
LPC float literals is now double too, matching float variables.
Correctly handle 64bit defines.

Also expose standard limit __INT_MAX__, __INT_MIN__,
__FLT_MAX__, __FLT_MIN__ as predefine.
Adding a test case for LPC int/float correctness verification.

It will pass as long as it is stored as C 64-bit int & double,
as well as parser correctly parse constant literals.