Don't use obsolete header kapp.h

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit a3480d329d)

acinclude.m4

@@ -1846,7 +1846,7 @@ cat > conftest.$ac_ext <<EOF
 #endif
 #include <stdio.h>
 #include "confdefs.h"
-#include <kapp.h>
+#include <tdeapplication.h>
 
 int main() {
     printf("kde_htmldir=\\"%s\\"\n", TDEApplication::kde_htmldir().data());

aclocal.m4

@@ -1858,7 +1858,7 @@ cat > conftest.$ac_ext <<EOF
 #endif
 #include <stdio.h>
 #include "confdefs.h"
-#include <kapp.h>
+#include <tdeapplication.h>
 
 int main() {
     printf("kde_htmldir=\\"%s\\"\n", TDEApplication::kde_htmldir().data());