[newlib-cygwin] string: fix strverscmp doc inclusion

[Yaakov Selkowitz]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=ec861247484908505e52f2fbb35405c8e2e23eed

commit ec861247484908505e52f2fbb35405c8e2e23eed
Author: Yaakov Selkowitz <yselkowi@redhat.com>
Date:   Mon Jun 19 11:52:02 2017 -0500

    string: fix strverscmp doc inclusion
    
    Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>

Diff:
---
 newlib/libc/string/strings.tex | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/newlib/libc/string/strings.tex b/newlib/libc/string/strings.tex
index 96fdefc..c619886 100644
--- a/newlib/libc/string/strings.tex
+++ b/newlib/libc/string/strings.tex
@@ -183,6 +183,9 @@ managing areas of memory.  The corresponding declarations are in
 @include string/strupr.def
 
 @page
+@include string/strverscmp.def
+
+@page
 @include string/strxfrm.def
 
 @page