Etoposide Recruiting Phase 2 Trials for Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities / Adult Acute Myeloid Leukemia With T(16;16)(p13;q22) / Adult Acute Myeloid Leukemia With T(8;21)(q22;q22) / Recurrent Adult Acute Myeloid Leukemia / Recurrent Childhood Acute Lymphoblastic Leukemia / Adult Acute Myeloid Leukemia With Del(5q) / Recurrent Adult Acute Lymphoblastic Leukemia / Adult Acute Myeloid Leukemia With T(15;17)(q22;q12) / Recurrent Childhood Acute Myeloid Leukemia / Adult Acute Myeloid Leukemia With Inv(16)(p13;q22) Treatment