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/Filelist b/Filelist
index 081d164..46bcdb4 100644
--- a/Filelist
+++ b/Filelist
@@ -73,6 +73,7 @@
 		src/float.c \
 		src/fold.c \
 		src/getchar.c \
+		src/gc.c \
 		src/globals.h \
 		src/gui.c \
 		src/gui.h \
@@ -264,6 +265,7 @@
 		src/proto/float.pro \
 		src/proto/fold.pro \
 		src/proto/getchar.pro \
+		src/proto/gc.pro \
 		src/proto/gui.pro \
 		src/proto/gui_beval.pro \
 		src/proto/hardcopy.pro \