debian/rules: Fix moved path crc*gen.c

Fixes: d4c3dc8d59a809cff277bba5e5fe19dd6604deec
Change-Id: I89b4e77e3a7e2de9ec56af4dc348ec060df8da4d
diff --git a/debian/rules b/debian/rules
index a96c893..91d5678 100755
--- a/debian/rules
+++ b/debian/rules
@@ -40,10 +40,10 @@
 	$(RM) include/osmocom/core/crc32gen.h
 	$(RM) include/osmocom/core/crc64gen.h
 	$(RM) include/osmocom/core/crc8gen.h
-	$(RM) src/crc16gen.c
-	$(RM) src/crc32gen.c
-	$(RM) src/crc64gen.c
-	$(RM) src/crc8gen.c
+	$(RM) src/core/crc16gen.c
+	$(RM) src/core/crc32gen.c
+	$(RM) src/core/crc64gen.c
+	$(RM) src/core/crc8gen.c
 	$(RM) tests/package.m4
 	$(RM) tests/testsuite
 	$(RM) -r doc/codec/