Ignore files generated when building for Windows

.gitignore

@@ -4,6 +4,7 @@
 .dirstamp
 .libs/
 *~
+*.exe
 *.o
 *.lo
 *.la
@@ -42,6 +43,7 @@ doc/stamp-vti
 doc/hamlib.html
 doc/version.texi
 hamlib-*.tar.gz
+hamlib-*.zip
 include/hamlib/config.h
 include/hamlib/config.h.in
 include/stamp-h1