Made a proper command-line flag out of disabling GL context resetting. --disable_gl_context_reset

src/xenia/gpu/gl4/gl4_gpu.cc

@@ -15,6 +15,10 @@
 DEFINE_bool(thread_safe_gl, false,
             "Only allow one GL context to be active at a time.");
 
+DEFINE_bool(disable_gl_context_reset, false,
+            "Do not aggressively reset the GL context (helps with capture "
+            "programs such as OBS or FRAPS).");
+
 DEFINE_bool(gl_debug_output, false, "Dump ARB_debug_output to stderr.");
 DEFINE_bool(gl_debug_output_synchronous, true,
             "ARB_debug_output will synchronize to be thread safe.");