Fixed compute shaders on mesa.

It was reporting an error:
[error  ] GLWrap: Error in shader gaussian6h.comp
[error  ] GLWrap: 0:77(1): error: storage qualifiers must come after precise, invariant, interpolation, layout and auxiliary storage qualifiers

data/shaders/bilateralH.comp

@@ -3,7 +3,7 @@
 uniform sampler2D source;
 uniform sampler2D depth;
 uniform vec2 pixel;
-uniform layout(r16f) volatile restrict writeonly image2D dest;
+layout(r16f) volatile restrict writeonly uniform image2D dest;
 uniform float sigma = 5.;
 
 layout (local_size_x = 8, local_size_y = 8) in;

data/shaders/bilateralV.comp

@@ -3,7 +3,7 @@
 uniform sampler2D source;
 uniform sampler2D depth;
 uniform vec2 pixel;
-uniform layout(r16f) volatile restrict writeonly image2D dest;
+layout(r16f) volatile restrict writeonly uniform image2D dest;
 uniform float sigma = 5.;
 
 layout (local_size_x = 8, local_size_y = 8) in;

data/shaders/blurshadowH.comp

@@ -1,5 +1,5 @@
 uniform sampler2D source;
-uniform layout(r32f) restrict writeonly image2D dest;
+layout(r32f) restrict writeonly uniform image2D dest;
 uniform vec2 pixel;
 uniform float weights[7];
 

data/shaders/blurshadowV.comp

@@ -1,5 +1,5 @@
 uniform sampler2D source;
-uniform layout(r32f) restrict writeonly image2D dest;
+layout(r32f) restrict writeonly uniform image2D dest;
 uniform vec2 pixel;
 uniform float weights[7];
 

data/shaders/gaussian6h.comp

@@ -1,5 +1,5 @@
 uniform sampler2D source;
-uniform layout(rgba16f) restrict writeonly image2D dest;
+layout(rgba16f) restrict writeonly uniform image2D dest;
 uniform vec2 pixel;
 uniform float weights[7];
 

data/shaders/gaussian6v.comp

@@ -1,5 +1,5 @@
 uniform sampler2D source;
-uniform layout(rgba16f) restrict writeonly image2D dest;
+layout(rgba16f) restrict writeonly uniform image2D dest;
 uniform vec2 pixel;
 uniform float weights[7];