Shaders: compile shaders also for GLSL 1.50 (GL 3.2).

It seems that ARB_explicit_attrib_location is not supported on GLSL 1.40
on OSX (even that the support is advertised).

src/Shaders/DistanceFieldVector.cpp

@@ -42,7 +42,7 @@ template<UnsignedInt dimensions> DistanceFieldVector<dimensions>::DistanceFieldV
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
     #else
     const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif

src/Shaders/Flat.cpp

@@ -41,7 +41,7 @@ template<UnsignedInt dimensions> Flat<dimensions>::Flat(const Flags flags): tran
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
     #else
     const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif

src/Shaders/Phong.cpp

@@ -35,7 +35,7 @@ Phong::Phong(const Flags flags): transformationMatrixUniform(0), projectionMatri
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
     #else
     const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif

src/Shaders/Vector.cpp

@@ -42,7 +42,7 @@ template<UnsignedInt dimensions> Vector<dimensions>::Vector(): transformationPro
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
     #else
     const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif

src/Shaders/VertexColor.cpp

@@ -41,7 +41,7 @@ template<UnsignedInt dimensions> VertexColor<dimensions>::VertexColor(): transfo
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
     #else
     const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif