graphics/gexiv2: fix minor darwin specific error in configure

graphics/gexiv2/distinfo

@@ -1,6 +1,8 @@
-$NetBSD: distinfo,v 1.4 2018/02/15 08:15:55 bsiegert Exp $
+$NetBSD: distinfo,v 1.5 2018/06/04 05:09:33 dbj Exp $
 
 SHA1 (gexiv2-0.10.8.tar.xz) = 8caafc5557a9acda3fcc023ee0e55d342b167cff
 RMD160 (gexiv2-0.10.8.tar.xz) = 0add27365ba86b6afd6c5b1f3a7571ec76ccbce3
 SHA512 (gexiv2-0.10.8.tar.xz) = 4c25cf6884495151947a70e62a096f3279223673bece4d4ff02720b2820aaad9e80c8715e02bf46c3f5598f582fdf07b4b3ddabd017d53001245e3381a4cc286
 Size (gexiv2-0.10.8.tar.xz) = 634696 bytes
+SHA1 (patch-configure) = 74dee7f4dce403569fc5279c91b27e1b4ce84694
+SHA1 (patch-configure.ac) = 336549798b0189aa7ad132fecc31d8e456878203

graphics/gexiv2/patches/patch-configure

@@ -0,0 +1,15 @@
+$NetBSD: patch-configure,v 1.1 2018/06/04 05:09:33 dbj Exp $
+
+There is a typo in the gexiv2-0.10.8 configure.ac and resulting configure
+
+--- configure.orig	2018-02-05 21:57:53.000000000 +0000
++++ configure
+@@ -18635,7 +18635,7 @@ case "$target_or_host" in
+ esac
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $platform_darwin" >&5
+ $as_echo "$platform_darwin" >&6; }
+- if test "$platform_win32" = "yes"; then
++ if test "$platform_darwin" = "yes"; then
+   PLATFORM_DARWIN_TRUE=
+   PLATFORM_DARWIN_FALSE='#'
+ else

graphics/gexiv2/patches/patch-configure.ac

@@ -0,0 +1,15 @@
+$NetBSD: patch-configure.ac,v 1.1 2018/06/04 05:09:33 dbj Exp $
+
+There is a typo in the gexiv2-0.10.8 configure.ac and configure
+
+--- configure.ac.orig	2018-02-05 21:56:47.000000000 +0000
++++ configure.ac
+@@ -220,7 +220,7 @@ case "$target_or_host" in
+     ;;
+ esac
+ AC_MSG_RESULT([$platform_darwin])
+-AM_CONDITIONAL(PLATFORM_DARWIN, test "$platform_win32" = "yes")
++AM_CONDITIONAL(PLATFORM_DARWIN, test "$platform_darwin" = "yes")
+ 
+ 
+ #################