build system: add setlocalversion

Version is built from git commit id, for example wmfs-ga33ec04-dirty
-> 'g', this is a git repo
-> a33ec04 is the beginning of the commit id (sha1)
-> dirty mean that there is uncommitted changes

wmfs users gives their 'wmfs -v' and developers can easily identify wmfs
version.

Move status.sh to scripts/ with setlocalversion

Signed-off-by: Philippe Pepiot <phil@philpep.org>

src/infobar.c

@@ -127,7 +127,7 @@ infobar_init(void)
           barwin_refresh(infobar[sc].bar);
 
           /* Default statustext is set here */
-          infobar[sc].statustext = xstrdup(WMFS_VERSION);
+          infobar[sc].statustext = xstrdup("wmfs"WMFS_VERSION);
 
           infobar_draw(sc);
      }

src/wmfs.c

@@ -486,7 +486,7 @@ main(int argc, char **argv)
                break;
 
           case 'v':
-               printf("WMFS "WMFS_VERSION"\n");
+               printf("wmfs"WMFS_VERSION"\n");
                exit(EXIT_SUCCESS);
                break;