glslang -> SPV: improved support for do-while/continue. Contributed by David Neto (dneto@google.com).

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31205 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/spv.do-while-continue-break.vert

@@ -0,0 +1,20 @@
+#version 300 es
+void main() {
+  int i = 0;
+  int A, B, C, D, E, F, G;
+  do {
+    A = 0;
+    if (i == 2) {
+      B = 1;
+      continue;
+      C = 2;
+    }
+    if (i == 5) {
+      D = 3;
+      break;
+      E = 42;
+    }
+    F = 99;
+  }  while (++i < 19);
+  G = 12;
+}