LatticeMico32 target support

This patch adds support for the LatticeMico32 softcore processor by Lattice
Semiconductor.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
diff --git a/elf.h b/elf.h
index d2f24f4..523c972 100644
--- a/elf.h
+++ b/elf.h
@@ -104,6 +104,7 @@
 
 #define EM_H8_300H      47      /* Hitachi H8/300H */
 #define EM_H8S          48      /* Hitachi H8S     */
+#define EM_LATTICEMICO32 138    /* LatticeMico32 */
 
 /*
  * This is an interim value that we will use until the committee comes