Fixed Linux build.

src/glimports.h

@@ -320,7 +320,7 @@ GL_IMPORT______(false, PFNGLGETSHADERIVPROC,                       glGetShaderiv
 GL_IMPORT______(false, PFNGLGETSHADERINFOLOGPROC,                  glGetShaderInfoLog);
 GL_IMPORT______(false, PFNGLGETSTRINGPROC,                         glGetString);
 GL_IMPORT______(false, PFNGLGETUNIFORMLOCATIONPROC,                glGetUniformLocation);
-#if !(BGFX_CONFIG_RENDERER_OPENGLES < 30)
+#if BGFX_CONFIG_RENDERER_OPENGL || !(BGFX_CONFIG_RENDERER_OPENGLES < 30)
 GL_IMPORT______(true,  PFNGLINVALIDATEFRAMEBUFFERPROC,             glInvalidateFramebuffer);
 #endif // !(BGFX_CONFIG_RENDERER_OPENGLES < 30)
 GL_IMPORT______(false, PFNGLLINKPROGRAMPROC,                       glLinkProgram);