Add PASS / FAIL annotations to tests missing them.

This tricked my import of the tests into piglit.

tests/constructor-01.glsl

@@ -1,3 +1,5 @@
+/* PASS */
+
 void main()
 {
   gl_Position = vec4(1.0, 1.0, 1.0, 0.0);;

tests/parameters-01.glsl

@@ -1,3 +1,5 @@
+/* FAIL: redefinition of a() */
+
 void a()
 {
 	;	

tests/parameters-02.glsl

@@ -1,3 +1,5 @@
+/* PASS */
+
 void a()
 {
 	;	

tests/swiz-01.glsl

@@ -1,3 +1,4 @@
+/* PASS */
 #version 120
 
 void main()

tests/swiz-02.glsl

@@ -1,3 +1,4 @@
+/* FAIL: assignment of a vec2 to a float */
 #version 120
 
 void main()