[gtk-osx] Add bison patch fixing vasnprintf() under macOS 10.13

[John Ralls <jralls src gnome org>]

commit 545dc1c6839883d2f8a290d8719aa348556c51d5
Author: Jiří Techet <techet gmail com>
Date:   Fri Sep 29 12:28:31 2017 +0200

    Add bison patch fixing vasnprintf() under macOS 10.13
    
    vasnprintf() now intentionally crashes on macOS 10.13 when the
    formatting string contains %n and is dynamically allocated. Avoid
    this by doing the same as in the Windows implementation.

 modulesets-stable/bootstrap.modules  |    4 +++-
 patches/bison-3.0.4-vasnprintf.patch |   11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/modulesets-stable/bootstrap.modules b/modulesets-stable/bootstrap.modules
index c49962e..f48ceee 100644
--- a/modulesets-stable/bootstrap.modules
+++ b/modulesets-stable/bootstrap.modules
@@ -143,7 +143,9 @@
        requires 2.4. -->
   <autotools id="bison" autogen-sh="configure">
     <branch repo="ftp.gnu.org" module="bison/bison-3.0.4.tar.xz"
-            version="3.0.4"/>
+            version="3.0.4">
+      <patch file="https://git.gnome.org/browse/gtk-osx/plain/patches/bison-3.0.4-vasnprintf.patch"; 
strip="1"/>
+    </branch>
     <dependencies>
       <dep package='flex'/>
     </dependencies>
diff --git a/patches/bison-3.0.4-vasnprintf.patch b/patches/bison-3.0.4-vasnprintf.patch
new file mode 100644
index 0000000..adc1452
--- /dev/null
+++ b/patches/bison-3.0.4-vasnprintf.patch
@@ -0,0 +1,11 @@
+--- bison-3.0.4-orig/lib/vasnprintf.c  2017-09-29 11:10:29.000000000 +0200
++++ bison-3.0.4/lib/vasnprintf.c       2017-09-29 11:15:06.000000000 +0200
+@@ -4858,7 +4858,7 @@
+ #endif
+                   *fbp = dp->conversion;
+ #if USE_SNPRINTF
+-# if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined 
_WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
++# if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined 
_WIN32 || defined __WIN32__) && ! defined __CYGWIN__) || defined __APPLE__)
+                 fbp[1] = '%';
+                 fbp[2] = 'n';
+                 fbp[3] = '\0';