patch 9.1.0431: eval.c is too long

Problem:  eval.c is too long
Solution: Move garbage collection code to new gc.c file
          (Yegappan Lakshmanan)

closes: #14824

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/Make_vms.mms b/src/Make_vms.mms
index f050c9d..559c2f8 100644
--- a/src/Make_vms.mms
+++ b/src/Make_vms.mms
@@ -369,6 +369,7 @@
 	float.c \
 	fold.c \
 	getchar.c \
+	gc.c \
 	gui_xim.c \
 	hardcopy.c \
 	hashtab.c \
@@ -500,6 +501,7 @@
 	float.obj \
 	fold.obj \
 	getchar.obj \
+	gc.obj \
 	gui_xim.obj \
 	hardcopy.obj \
 	hashtab.obj \
@@ -942,6 +944,10 @@
  ascii.h keymap.h termdefs.h macros.h structs.h regexp.h \
  gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
  errors.h globals.h
+gc.obj : gc.c vim.h [.auto]config.h feature.h os_unix.h \
+ ascii.h keymap.h termdefs.h macros.h structs.h regexp.h \
+ gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
+ errors.h globals.h
 gui_xim.obj : gui_xim.c vim.h [.auto]config.h feature.h os_unix.h \
  ascii.h keymap.h termdefs.h macros.h structs.h regexp.h \
  gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \