patch 8.2.0660: the search.c file is a bit big

Problem:    The search.c file is a bit big.
Solution:   Split off the text object code to a separate file. (Yegappan
            Lakshmanan, closes #6007)
diff --git a/Filelist b/Filelist
index 46f6774..ef65b8d 100644
--- a/Filelist
+++ b/Filelist
@@ -128,6 +128,7 @@
 		src/term.h \
 		src/termlib.c \
 		src/testing.c \
+		src/textobject.c \
 		src/textprop.c \
 		src/time.c \
 		src/ui.c \
@@ -279,6 +280,7 @@
 		src/proto/terminal.pro \
 		src/proto/termlib.pro \
 		src/proto/testing.pro \
+		src/proto/textobject.pro \
 		src/proto/textprop.pro \
 		src/proto/time.pro \
 		src/proto/ui.pro \