Update GLSLCompat.glsllib

jme3-core/src/main/resources/Common/ShaderLib/GLSLCompat.glsllib

@@ -1,8 +1,10 @@
 #ifdef FRAGMENT_SHADER
       precision highp float;
       precision highp int;
-      precision highp sampler2DArray;
-      precision highp sampler2DShadow;
+      #if __VERSION__ >= 130
+	    precision highp sampler2DArray;        
+      #endif
+	  precision highp sampler2DShadow;
       precision highp samplerCube;
       precision highp sampler3D;
       precision highp sampler2D;