glslang SPV tests: Add two more source tests for the last check in.

Test/spv.double.comp

+#version 430
+
+const double d1 = 3.1415926535897932384626433832795LF;
+const double d2 = 3.1415;
+const double d3 = 3.1415926535897932384626433832795LF;
+const double d4 = 3.1415926535897932384626433832795;
+
+buffer bufName {
+    float f;
+    double d;
+} bufInst;
+
+uniform double roll;
+uniform writeonly image2D destTex;
+
+void main()
+{
+    bufInst.d = float(d1);
+    bufInst.f = float(d1 + d2 + d3 + d4);
+
+    ivec2 storePos = ivec2(gl_GlobalInvocationID.xy);
+    double localCoef = length(vec2(ivec2(gl_LocalInvocationID.xy)-8)/8.0);
+    dvec4 aa = dvec4(0.4, 0.2, 0.3, 0.4);
+    double globalCoef = 1.0;
+}

Test/spv.set.vert

+#version 450
+
+layout(set = 4, binding = 7) uniform sampler2D sampler;
+
+layout(set = 0, binding = 8) buffer setBuf {
+    vec4 color;
+} setBufInst;
+
+out vec4 color;
+
+void main()
+{
+    color = setBufInst.color;
+}