patch 7.4.750
Problem:    Cannot build with clang 3.5 on Cygwin with perl enabled.
Solution:   Strip "-fdebug-prefix-map" in configure. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index ac053e6..1ca7c5c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    750,
+/**/
     749,
 /**/
     748,