Version bump for 1.15.1

ChangeLog

+1.15.1 - 2020-06-10
+	- (Linux) Fix build on older Linux systems (Christian Göttsche)
+	- (MacOS) Revert "Exclude firmlinks by default" behavior (until we have a better solution)
+	- (MacOS) Add --exclude-firmlinks option to opt-in to the above behavior
+
 1.15 - 2020-05-30
 	- (Linux) Add --exclude-kernfs option to exclude pseudo filesystems (Christian Göttsche)
 	- (MacOS) Exclude firmlinks by default (Saagar Jha)

README

-ncdu 1.15
-=========
+ncdu 1.15.1
+===========
 
 DESCRIPTION
 

configure.ac

 
-AC_INIT([ncdu],[1.15],[projects@yorhel.nl])
+AC_INIT([ncdu],[1.15.1],[projects@yorhel.nl])
 AC_CONFIG_SRCDIR([src/global.h])
 AC_CONFIG_HEADER([config.h])
 AM_INIT_AUTOMAKE([foreign std-options subdir-objects])