labplot, bump to 2.12.1 (#12806)

sci-visualization/labplot/patches/labplot-2.12.1.patchset

@@ -0,0 +1,22 @@
+From fa74e06606e86bd4e6f79a202d099b33fb095d0f Mon Sep 17 00:00:00 2001
+From: Luc Schrijvers <begasus@gmail.com>
+Date: Sat, 26 Apr 2025 19:12:21 +0200
+Subject: Don't default to xcb qt plugin on Haiku
+
+
+diff --git a/src/frontend/LabPlot.cpp b/src/frontend/LabPlot.cpp
+index 23bab67..50cf6dd 100644
+--- a/src/frontend/LabPlot.cpp
++++ b/src/frontend/LabPlot.cpp
+@@ -42,7 +42,7 @@
+ #endif
+ 
+ int main(int argc, char* argv[]) {
+-#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN)
++#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN) && !defined(Q_OS_HAIKU)
+ 	// the qads library has issues on wayland so we force qt to use x11 instead
+ 	// see https://invent.kde.org/education/labplot/-/issues/1067
+ 	QByteArray xcbQtQpaEnvVar("xcb");
+-- 
+2.50.1
+