Update depend files

- Recently added ryu.h is missing in parser/depend.
- Remove duplicate dependencies on the sources.

Author: nobu

ext/json/ext/generator/depend

@@ -1,4 +1,7 @@
-generator.o: generator.c $(srcdir)/../fbuffer/fbuffer.h
-generator.o: generator.c $(srcdir)/../vendor/fpconv.c
-generator.o: generator.c $(srcdir)/../vendor/jeaiii-ltoa.h
-generator.o: generator.c $(srcdir)/../simd/simd.h
+# AUTOGENERATED DEPENDENCIES START
+generator.o: $(srcdir)/../fbuffer/fbuffer.h
+generator.o: $(srcdir)/../simd/simd.h
+generator.o: $(srcdir)/../vendor/fpconv.c
+generator.o: $(srcdir)/../vendor/jeaiii-ltoa.h
+generator.o: generator.c
+# AUTOGENERATED DEPENDENCIES END

ext/json/ext/parser/depend

@@ -1,2 +1,6 @@
-parser.o: parser.c $(srcdir)/../fbuffer/fbuffer.h
-parser.o: parser.c $(srcdir)/../simd/simd.h
+# AUTOGENERATED DEPENDENCIES START
+parser.o: $(srcdir)/../fbuffer/fbuffer.h
+parser.o: $(srcdir)/../simd/simd.h
+parser.o: $(srcdir)/../vendor/ryu.h
+parser.o: parser.c
+# AUTOGENERATED DEPENDENCIES END