Remove stderr from grep's output on cygwin

tresf · tresf · commit 2714a017c9fa · 2021-01-07T06:02:21.000-05:00
See also https://cygwin.com/faq.html#faq.using.fixing-find_fast_cwd-warnings
diff --git a/build.xml b/build.xml
@@ -749,7 +749,8 @@ osname=macosx;processor=x86;processor=x86-64;processor=ppc
     </condition>
     <!-- args are based on GNU grep, other versions may differ -->
     <apply dir="${build.headers}" executable="${grep}" parallel="true"
-           failonerror="${grep.required}" relative="true" output="${md5.file}">
+           failonerror="${grep.required}" relative="true" output="${md5.file}"
+           error="${md5.file}.error">
       <arg value="-A"/>
       <arg value="1"/>
       <arg value="JNIEXPORT"/>
