wxWidgets-gtk3: add patch so ABI mismatch errors aren't fatal.

The version string used by wx to check for a "compatible" ABI includes
the C++ ABI, which changed between GCC 9 and 10 (1013 and 1014,
respectively). This made it so launching a program built with GCC 10
with wxWidgets built with GCC 9 failed. Once wxWidgets was rebuilt with
GCC 10, applications built with GCC 9 would be the ones to fail.

srcpkgs/wxWidgets-gtk3/patches/nonfatal-abi-check.patch

@@ -0,0 +1,18 @@
+Taken from
+https://github.com/archlinux/svntogit-packages/blob/71ee17d529f8e0dc5c44d2fffb0dfa69b71daa0b/repos/extra-x86_64/make-abicheck-non-fatal.patch
+
+diff -up wxGTK-2.8.12/src/common/appbase.cpp.abicheck wxGTK-2.8.12/src/common/appbase.cpp
+--- src/common/appbase.cpp.abicheck	2015-03-12 17:15:18.000000000 +0100
++++ src/common/appbase.cpp	2015-03-12 17:15:57.000000000 +0100
+@@ -424,10 +424,7 @@ bool wxAppConsole::CheckBuildOptions(con
+         msg.Printf(_T("Mismatch between the program and library build versions detected.\nThe library used %s,\nand %s used %s."),
+                    lib.c_str(), progName.c_str(), prog.c_str());
+ 
+-        wxLogFatalError(msg.c_str());
+-
+-        // normally wxLogFatalError doesn't return
+-        return false;
++        wxLogWarning(msg.c_str());
+     }
+ #undef wxCMP
+ 

srcpkgs/wxWidgets-gtk3/template

@@ -1,7 +1,7 @@
 # Template file for 'wxWidgets-gtk3'
 pkgname=wxWidgets-gtk3
 version=3.0.5.1
-revision=2
+revision=3
 wrksrc="wxWidgets-${version}"
 build_style=gnu-configure
 configure_args="--with-gtk=3 --enable-unicode --with-opengl --with-sdl