Web: Add sanity check test suite for smaller-footprint builds.

For the smallest builds, google tests will not be present, in
addition to a large number of tests not being capable of running.

Test/web.operations.frag

@@ -0,0 +1,73 @@
+#version 310 es
+
+precision highp float;
+
+layout(binding = 0) uniform block {
+    mediump float f;
+} instanceName;
+
+struct S {
+    int i;
+} s;
+
+float a[5];
+
+void main()
+{
+    bool b;
+    float f;
+    int i;
+    uint u;
+    bvec3 b3;
+    vec3 v3;
+    ivec3 iv3;
+    uvec3 uv3;
+    vec4 v4;
+    ivec4 iv4;
+    uvec4 uv4;
+    mat2 m2;
+    mat4 m4;
+
+    f * v4;
+    u + u;
+    uv4 / u;
+    iv3 -= iv3;
+    
+    i %= 3;
+    uv3 % 4u;
+    --m2;
+    iv4++;
+
+    m4 != m4;
+    m2 == m2;
+    i <= i;
+    a == a;
+    s != s;
+
+    b && b;
+    b || b;
+    b ^^ b;
+
+    !b, uv3;
+
+    ~i;
+    ~u;
+    ~uv3;
+    ~iv3;
+
+    uv3 <<= i;
+    i >> i;
+    u << u;
+    iv3 >> iv3;
+
+    i & i;
+    u | u;
+    iv3 ^ iv3;
+    u & uv3;
+    uv3 | u;
+    uv3 &= u;
+    int arr[0x222 & 0xf];
+    arr[1]; // size 2
+    int arr2[(uvec2(0, 0x2) | 0x1u).y];
+    arr2[2]; // size 3
+}