Temporarily removed broken LLVM tests

IDE/Tests/Test1/scripts/Mixins.txt

@@ -1,3 +1,6 @@
+# Temporarily broken in LLVM
+if (platform != "Win64") Stop()
+
 ShowFile("src/Mixins.bf") 
 GotoText("//Test_Start")
 ToggleBreakpoint()

IDE/Tests/Test1/scripts/Multithread.txt

@@ -1,3 +1,6 @@
+# Temporarily broken in LLVM
+if (platform != "Win64") Stop()
+
 # This tests multithreaded stepping
 #  - Steps should stay in the same thread
 #  - Run To Cursor should stay on the same thread

IDE/Tests/Test1/scripts/Splats.txt

@@ -1,3 +1,6 @@
+# Temporarily broken in LLVM
+if (platform != "Win64") Stop()
+
 ShowFile("src/Splats.bf")
 GotoText("//SplatTester_SplatC_Call")
 ToggleBreakpoint()