tools/check-includes.sh: test that c files include their .h files.

This is best-practice (to ensure prototypes match up), but there were a
few places we didn't (at least, directly).  Make it a requirement,
either of form "foo.h" or <dir/foo.h>.

The noise is the change to our print templates.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tools/check-includes.sh

@@ -56,6 +56,12 @@ for C_FILE in $(filter_suffix c); do
         echo
         EXIT_CODE=1
     fi
+    H_FILE="${C_FILE%.c}.h"
+    H_BASE="$(basename "$H_FILE")"
+    if [ -f "$H_FILE" ] && ! grep -E '#include (<'"$H_FILE"'>|"'"$H_BASE"'")' "$C_FILE" > /dev/null; then
+	echo "${C_FILE} does not include $H_FILE" >& 2
+	EXIT_CODE=1
+    fi
 done
 
 exit ${EXIT_CODE}

tools/gen/print_impl_template

@@ -1,7 +1,7 @@
 /* This file was generated by generate-wire.py */
 /* Do not modify this file! Modify the .csv file it was generated from. */
 
-#include "${options.header_filename}"
+#include <${header_filename}>
 #include <ccan/array_size/array_size.h>
 #include <ccan/mem/mem.h>
 #include <ccan/tal/str/str.h>