add test case for typechecking of lincat

testsuite/compiler/check/lincat-types/Test.gf

@@ -0,0 +1,5 @@
+abstract Test = {
+
+cat S;
+
+}

testsuite/compiler/check/lincat-types/TestCnc.gf

@@ -0,0 +1,5 @@
+concrete TestCnc of Test = open Predef in {
+
+lincat S = PTrue ;
+
+}

testsuite/compiler/check/lincat-types/test.gfs

@@ -0,0 +1 @@
+i -src testsuite/compiler/check/lincat-types/TestCnc.gf

testsuite/compiler/check/lincat-types/test.gfs.gold

@@ -0,0 +1,7 @@
+␍
+␍
+checking module TestCnc␍
+   Happened in linearization type of S in TestCnc.gf, line 3:␍
+       type of PTrue␍
+      expected: Type␍
+      inferred: PBool␍