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>

openingd/dualopend_wiregen.c

@@ -1051,4 +1051,4 @@ bool fromwire_dualopend_validate_lease_reply(const tal_t *ctx, const void *p, wi
 	}
 	return cursor != NULL;
 }
-// SHA256STAMP:4f00f3d34c3e8137837cf975ff52c868901b17ce0bc72efa61a561b0bb29fb07
+// SHA256STAMP:da973afd41ef15546d902945a3108aa3c02571d13ffaff0aed63c1ac39740f04

openingd/dualopend_wiregen.h

@@ -225,4 +225,4 @@ bool fromwire_dualopend_validate_lease_reply(const tal_t *ctx, const void *p, wi
 
 
 #endif /* LIGHTNING_OPENINGD_DUALOPEND_WIREGEN_H */
-// SHA256STAMP:4f00f3d34c3e8137837cf975ff52c868901b17ce0bc72efa61a561b0bb29fb07
+// SHA256STAMP:da973afd41ef15546d902945a3108aa3c02571d13ffaff0aed63c1ac39740f04

openingd/openingd_wiregen.c

@@ -608,4 +608,4 @@ bool fromwire_openingd_dev_memleak_reply(const void *p, bool *leak)
  	*leak = fromwire_bool(&cursor, &plen);
 	return cursor != NULL;
 }
-// SHA256STAMP:f1728e2b3e5e2001e7620e23b0d1c1d359569684fd7d585b6f4471d1abeb332c
+// SHA256STAMP:728c4fe1f57fe55a1d7669ec138002ae1ffa61813549bddcc5a07a994ea7211f

openingd/openingd_wiregen.h

@@ -129,4 +129,4 @@ bool fromwire_openingd_dev_memleak_reply(const void *p, bool *leak);
 
 
 #endif /* LIGHTNING_OPENINGD_OPENINGD_WIREGEN_H */
-// SHA256STAMP:f1728e2b3e5e2001e7620e23b0d1c1d359569684fd7d585b6f4471d1abeb332c
+// SHA256STAMP:728c4fe1f57fe55a1d7669ec138002ae1ffa61813549bddcc5a07a994ea7211f