set glsl100 back to 100

examples/shaders/resources/shaders/glsl100/julia_set.fs

@@ -1,4 +1,6 @@
-#version 120
+#version 100
+
+precision mediump float;
 
 // Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;

examples/shaders/resources/shaders/glsl100/mask.fs

@@ -1,4 +1,6 @@
-#version 120
+#version 100
+
+precision mediump float;
 
 // Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;