Fix some header identifications

The following header files missed the shot:
- jsonfuncs.h, as of ce0425b.
- jsonapi.h, as of beb4699.
- llvmjit_emit.h as of 7ec0d80.
- partdesc.h, as of 1bb5e78.

Author: Jesse Zhang
Discussion: https://postgr.es/m/CAGf+fX4-8xULEOz09DE2dZGjT+q8VJ--rqfTpvcFwc+A4fc-3Q@mail.gmail.com

Author: michaelpq

src/include/common/jsonapi.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * src/include/utils/jsonapi.h
+ * src/include/common/jsonapi.h
  *
  *-------------------------------------------------------------------------
  */

src/include/jit/llvmjit_emit.h

@@ -4,7 +4,7 @@
  *
  * Copyright (c) 2018-2020, PostgreSQL Global Development Group
  *
- * src/include/lib/llvmjit_emit.h
+ * src/include/jit/llvmjit_emit.h
  */
 #ifndef LLVMJIT_EMIT_H
 #define LLVMJIT_EMIT_H

src/include/partitioning/partdesc.h

@@ -4,7 +4,7 @@
  *
  * Copyright (c) 1996-2020, PostgreSQL Global Development Group
  *
- * src/include/utils/partdesc.h
+ * src/include/partitioning/partdesc.h
  *
  *-------------------------------------------------------------------------
  */

src/include/utils/jsonfuncs.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * src/include/utils/jsonapi.h
+ * src/include/utils/jsonfuncs.h
  *
  *-------------------------------------------------------------------------
  */