Commits on Jul 9, 2017

1. Allows ./autogen.sh to be called from a Makefile …

   To reproduce the problem create the following makefile:
   ```make
   .PHONY: ctags
   ctags:
   	./autogen.sh
   ```
   
   Then call it, you should see output as following:
   ```
   ./autogen.sh
   autoreconf is /usr/bin/autoreconf
   pkg-config is /usr/bin/pkg-config
   autoreconf: Entering directory `.'
   autoreconf: configure.ac: not using Gettext
   autoreconf: running: aclocal --force
   autoreconf: configure.ac: tracing
   autoreconf: configure.ac: not using Libtool
   autoreconf: running: /usr/bin/autoconf --force
   autoreconf: running: /usr/bin/autoheader --force
   autoreconf: running: automake --add-missing --copy --force-missing
   configure.ac:262: installing './compile'
   configure.ac:23: installing './config.guess'
   configure.ac:23: installing './config.sub'
   configure.ac:11: installing './install-sh'
   configure.ac:11: installing './missing'
   Makefile.am: installing './depcomp'
   /usr/share/automake-1.15/am/tags.am: warning: redefinition of 'ctags' ...
   /usr/share/automake-1.15/am/program.am: ... 'ctags$(EXEEXT)' previously defined here
   Makefile.am:15:   while processing program 'ctags'
   autoreconf: Leaving directory `.'
   optlib2c: translating make[1]: to make[1]:.c
   cannot open the optlib file: "make[1]:" at ./misc/optlib2c line 266.
   optlib2c: translating Entering to Entering.c
   cannot open the optlib file: "Entering" at ./misc/optlib2c line 266.
   optlib2c: translating directory to directory.c
   cannot open the optlib file: "directory" at ./misc/optlib2c line 266.
   optlib2c: translating '/home/sdwolf/Projects/ctags' to '/home/sdwolf/Projects/ctags'.c
   ./autogen.sh: line 13: '/home/sdwolf/Projects/ctags'.c: No such file or directory
   optlib2c: translating optlib/RSpec.ctags to optlib/RSpec.c
   optlib2c: translating optlib/ctags-optlib.ctags to optlib/ctags-optlib.c
   optlib2c: translating optlib/elm.ctags to optlib/elm.c
   optlib2c: translating optlib/gdbinit.ctags to optlib/gdbinit.c
   optlib2c: translating optlib/man.ctags to optlib/man.c
   optlib2c: translating optlib/passwd.ctags to optlib/passwd.c
   optlib2c: translating optlib/pod.ctags to optlib/pod.c
   optlib2c: translating optlib/qemuhx.ctags to optlib/qemuhx.c
   optlib2c: translating make[1]: to make[1]:.c
   cannot open the optlib file: "make[1]:" at ./misc/optlib2c line 266.
   optlib2c: translating Leaving to Leaving.c
   cannot open the optlib file: "Leaving" at ./misc/optlib2c line 266.
   optlib2c: translating directory to directory.c
   cannot open the optlib file: "directory" at ./misc/optlib2c line 266.
   optlib2c: translating '/home/sdwolf/Projects/ctags' to '/home/sdwolf/Projects/ctags'.c
   ./autogen.sh: line 13: '/home/sdwolf/Projects/ctags'.c: No such file or directory
   make: *** [Mak:3: ctags] Error 1
   ```
   
   This is because `make -f makefiles/list-translator-input.mak` produces the
   following output when being called from another Makefile:
   ```
   make -f makefiles/list-translator-input.mak
   make[1]: Entering directory '/home/sdwolf/Projects/ctags'
   optlib/RSpec.ctags
   optlib/ctags-optlib.ctags
   optlib/elm.ctags
   optlib/gdbinit.ctags
   optlib/man.ctags
   optlib/passwd.ctags
   optlib/pod.ctags
   optlib/qemuhx.ctags
   make[1]: Leaving directory '/home/sdwolf/Projects/ctags'
   ```
   
   When instead it should only output:
   ```
   optlib/RSpec.ctags
   optlib/ctags-optlib.ctags
   optlib/elm.ctags
   optlib/gdbinit.ctags
   optlib/man.ctags
   optlib/passwd.ctags
   optlib/pod.ctags
   optlib/qemuhx.ctags
   ```

   

   sdwolfz committed Jul 9, 2017
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