RULE-21-5: Simplify alert message, remove signal.h

Author: lcartey

c/misra/src/rules/RULE-21-5/StandardHeaderFileUsedSignalh.ql

@@ -18,4 +18,4 @@ where
   not isExcluded(fc, BannedPackage::standardHeaderFileUsedSignalhQuery()) and
   fc.getTarget() = f and
   f.getFile().getBaseName() = "signal.h"
-select fc, "Call to banned function $@.", f, f.getName()
+select fc, "Call to banned function " + f.getName() + "."

c/misra/test/rules/RULE-21-5/StandardHeaderFileUsedSignalh.expected

@@ -1,2 +1,2 @@
-| test.c:4:7:4:12 | call to signal | Call to banned function $@. | signal.h:282:8:282:13 | signal | signal |
-| test.c:6:7:6:11 | call to raise | Call to banned function $@. | signal.h:283:5:283:9 | raise | raise |
+| test.c:4:7:4:12 | call to signal | Call to banned function signal. |
+| test.c:6:7:6:11 | call to raise | Call to banned function raise. |

c/misra/test/rules/RULE-21-5/signal.h

@@ -1,4 +1,4 @@
-#include "signal.h"
+#include <signal.h>
 static void catch_function(int p1) {}
 void f1(void) {
   if (signal(SIGINT, catch_function) == SIG_ERR) { // NON_COMPLIANT