patch 9.0.0588: MorphOS build is broken

Problem:    MorphOS build is broken.
Solution:   Add "-lm" to LDFLAGS and "-noixemul" to CFLAGS. (Ola Söder,
            closes #11222)
diff --git a/src/version.c b/src/version.c
index 8c9cc5c..b0f53ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    588,
+/**/
     587,
 /**/
     586,