Simple loop in IL

This test case it part of the test suite proposed for new devices.

Test case ID: R0270
Language: ST,IL

Code: 
tests2/t0270a.il

PROGRAM TESTIL_R0270

    VAR_GLOBAL
        B : BOOL;
        i : INT;
    END_VAR

    LD 0
    ST i
    LOOP10: LD i
    ADD 5
    SUB 4
    ST i
    LT 10
    JMPC LOOP10

END_PROGRAM

tests2/t0270b.st

PROGRAM ZTESTIL_R0270

    VAR_EXTERNAL
        i : INT;
    END_VAR

  _GEB_ASSERT_(i = 10);

END_PROGRAM