OpenGL ES: Fix GLSL version number for 1.00 (#5582)

Wikipedia had it wrong: the spec for the OpenGL ES Shading Language Version 1.00 defines the version preprocessor directive as "#version 100", and _not_ "#version 100 es", like version 3.00+ of the language wants it.

This made the Raspberry Pi with the legacy driver unhappy. Thanks @DangusTaargus for reporting.

see https://www.khronos.org/files/opengles_shading_language.pdf

core/src/processing/opengl/PJOGL.java

@@ -513,7 +513,8 @@ public class PJOGL extends PGL {
 
   @Override
   protected String getGLSLVersionSuffix() {
-    if (context.isGLESProfile()) {
+    VersionNumber vn = context.getGLSLVersionNumber();
+    if (context.isGLESProfile() && 1 < vn.getMajor()) {
       return " es";
     } else {
       return "";