Add NVidia to list of detected drivers.

I hoped this commit will never need to happen.

src/Magnum/Context.h

@@ -209,6 +209,11 @@ class MAGNUM_EXPORT Context {
             IntelWindows = 1 << 1,
             #endif
 
+            #ifndef MAGNUM_TARGET_WEBGL
+            /** Binary NVidia drivers */
+            NVidia = 1 << 2,
+            #endif
+
             #ifdef MAGNUM_TARGET_GLES
             /**
              * OpenGL ES implementation by ANGLE (translated to D3D), used by
@@ -216,7 +221,7 @@ class MAGNUM_EXPORT Context {
              * specification explicitly disallows exposing driver information
              * to the application, this check cannot be done reliably.
              */
-            ProbablyAngle = 1 << 2
+            ProbablyAngle = 1 << 3
             #endif
         };
 

src/Magnum/Implementation/driverSpecific.cpp

@@ -113,6 +113,11 @@ auto Context::detectedDriver() -> DetectedDrivers {
     #endif
     #endif
 
+    #ifndef MAGNUM_TARGET_WEBGL
+    if(vendor.find("NVIDIA Corporation") != std::string::npos)
+        return *_detectedDrivers |= DetectedDriver::NVidia;
+    #endif
+
     /** @todo there is also D3D9/D3D11 distinction on webglreport.com, is it useful? */
     #ifdef MAGNUM_TARGET_GLES
     /* OpenGL ES implementation using ANGLE. Taken from these sources: