File patch_installdir.patch of Package vis

--- Makefile.in.old	2017-02-23 00:06:32.498888624 +0800
+++ Makefile.in	2017-02-23 01:29:41.686963626 +0800
@@ -201,11 +201,11 @@
 
 # Directory in which to install architecture-independent files
 # Set by ./configure --prefix=...
-prefix =	@prefix@
+prefix =	$(DESTDIR)@prefix@
 
 # Directory in which to install architecture-dependent files
 # Set by ./configure --exec-prefix=...
-exec_prefix =	@exec_prefix@
+exec_prefix =	$(DESTDIR)@exec_prefix@
 
 # Directory in which to install binaries
 bindir =	$(exec_prefix)/bin
@@ -220,7 +220,7 @@
 datadir =	$(prefix)/share/vis
 
 # Directory for the man page
-mandir = $(prefix)/man/man1
+mandir =	$(prefix)/share/man/man1
 
 #----------------------------------------------------------------------
 # The following are set by the configure script