einfo: symlink rather then duplicate multicall binary

Rather then have many copies of the same executable, that differ in only
name, create a single copy and symlink all the others.

Author: jsbronder

src/einfo/meson.build

@@ -1,6 +1,5 @@
 einfo_execs = [
   'einfon',
-  'einfo',
   'ewarnn',
   'ewarn',
   'eerrorn',
@@ -22,11 +21,18 @@ einfo_execs = [
   'veoutdent',
   ]
 
-foreach exec: einfo_execs
-  executable(exec,
+executable('einfo',
     ['einfo.c', version_h],
     include_directories: [incdir, einfo_incdir, rc_incdir],
     link_with: [libeinfo, librc],
     install: true,
     install_dir: rc_bindir)
+
+foreach exec: einfo_execs
+  custom_target(exec,
+    output: exec,
+    command: ['ln', '-sf', 'einfo', '@OUTPUT@'],
+    build_always: true,
+    install: true,
+    install_dir: rc_bindir)
 endforeach