Ruby 2.1.6 Test Fix Patch for Cygwin Build

ruby-2.1.6-test-fix-on-cygwin.patch

diff --git a/ext/-test-/printf/printf.c b/ext/-test-/printf/printf.c
index d913fe5..1ebe804 100644
--- a/ext/-test-/printf/printf.c
+++ b/ext/-test-/printf/printf.c
@@ -28,7 +28,7 @@ printf_test_q(VALUE self, VALUE obj)
 }

 static char *
-utoa(char *p, char *e, unsigned int x)
+my_utoa(char *p, char *e, unsigned int x)
 {
     char *e0 = e;
     if (e <= p) return p;
@@ -79,12 +79,12 @@ printf_test_call(int argc, VALUE *argv, VALUE self)
 	    *p++ = '0';
 	}
 	if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("width"))))) {
-	    p = utoa(p, format + sizeof(format), NUM2UINT(v));
+	    p = my_utoa(p, format + sizeof(format), NUM2UINT(v));
 	}
 	if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("prec"))))) {
 	    *p++ = '.';
 	    if (FIXNUM_P(v))
-		p = utoa(p, format + sizeof(format), NUM2UINT(v));
+		p = my_utoa(p, format + sizeof(format), NUM2UINT(v));
 	}
     }
     *p++ = cnv;