DebugTools: disable bufferData() tests on drivers w/o map_buffer_range.

Was crashing, haha.

src/Magnum/DebugTools/Test/BufferDataGLTest.cpp

@@ -26,6 +26,8 @@
 #include <Corrade/TestSuite/Compare/Container.h>
 
 #include "Magnum/DebugTools/BufferData.h"
+#include "Magnum/GL/Context.h"
+#include "Magnum/GL/Extensions.h"
 #include "Magnum/GL/OpenGLTester.h"
 
 namespace Magnum { namespace DebugTools { namespace Test { namespace {
@@ -45,6 +47,14 @@ BufferDataGLTest::BufferDataGLTest() {
 constexpr Int Data[] = {2, 7, 5, 13, 25};
 
 void BufferDataGLTest::data() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!GL::Context::current().isExtensionSupported<GL::Extensions::ARB::map_buffer_range>())
+        CORRADE_SKIP(GL::Extensions::ARB::map_buffer_range::string() + std::string(" is not supported"));
+    #elif defined(MAGNUM_TARGET_GLES2)
+    if(!GL::Context::current().isExtensionSupported<GL::Extensions::EXT::map_buffer_range>())
+        CORRADE_SKIP(GL::Extensions::EXT::map_buffer_range::string() + std::string(" is not supported"));
+    #endif
+
     GL::Buffer buffer;
     buffer.setData(Data, GL::BufferUsage::StaticDraw);
     const Containers::Array<Int> contents = bufferData<Int>(buffer);
@@ -54,6 +64,14 @@ void BufferDataGLTest::data() {
 }
 
 void BufferDataGLTest::subData() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!GL::Context::current().isExtensionSupported<GL::Extensions::ARB::map_buffer_range>())
+        CORRADE_SKIP(GL::Extensions::ARB::map_buffer_range::string() + std::string(" is not supported"));
+    #elif defined(MAGNUM_TARGET_GLES2)
+    if(!GL::Context::current().isExtensionSupported<GL::Extensions::EXT::map_buffer_range>())
+        CORRADE_SKIP(GL::Extensions::EXT::map_buffer_range::string() + std::string(" is not supported"));
+    #endif
+
     GL::Buffer buffer;
     buffer.setData(Data, GL::BufferUsage::StaticDraw);
     const Containers::Array<Int> contents = bufferSubData<Int>(buffer, 4, 3);