pkgsrc/wm/evilwm fix

[ddeus.pkgsrc%mailnull.com@localhost]

Hi! Please add the line "MAKE_FLAGS+= OPT_CPPFLAGS=-D_XOPEN_SOURCE" to 
Makefile of wm/evilwm, because otherwise evilwm do not work correctly 
(f.e. become segfault on -mask1 parameters, because of undefined strdup 
function).

Thanks,
Oleksandr.

Index: wm/evilwm/Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/wm/evilwm/Makefile,v
retrieving revision 1.34
diff -u -r1.34 Makefile
--- wm/evilwm/Makefile	29 Jul 2015 17:12:31 -0000	1.34
+++ wm/evilwm/Makefile	13 Jan 2017 13:11:03 -0000
@@ -10,6 +10,7 @@
 COMMENT=	Minimalist Window Manager for X
 
 USE_TOOLS+=	gmake
+MAKE_FLAGS+=    OPT_CPPFLAGS=-D_XOPEN_SOURCE
 
 INSTALLATION_DIRS=	bin ${PKGMANDIR}/man1 share/doc/evilwm