bash: Import upstream patches

Source:
https://ftp.gnu.org/gnu/bash/bash-5.0-patches/
(bash50-003 to bash50-017)

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit dc5f2df6a4)

utils/bash/patches/109-bash50-009.patch

@@ -0,0 +1,42 @@
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.0
+Patch-ID:	bash50-009
+
+Bug-Reported-by:	chet.ramey@case.edu
+Bug-Reference-ID:
+Bug-Reference-URL:
+
+Bug-Description:
+
+The history file reading code doesn't close the file descriptor open to
+the history file when it encounters a zero-length file.
+
+Patch (apply with `patch -p0'):
+
+*** a/lib/readline/histfile.c	2018-06-11 09:14:52.000000000 -0400
+--- b/lib/readline/histfile.c	2019-05-16 15:55:57.000000000 -0400
+***************
+*** 306,309 ****
+--- 312,316 ----
+      {
+        free (input);
++       close (file);
+        return 0;	/* don't waste time if we don't have to */
+      }
+*** a/patchlevel.h	2016-06-22 14:51:03.000000000 -0400
+--- b/patchlevel.h	2016-10-01 11:01:28.000000000 -0400
+***************
+*** 26,30 ****
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 8
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 9
+  
+  #endif /* _PATCHLEVEL_H_ */