zebra: Fix build error when `--disable-bfdd`

When FRR is built with the option `--disable-bfdd`, the build process
fails with the following error:

```
zebra/zebra_ptm.c: In function ‘zebra_ptm_init’:
zebra/zebra_ptm.c:119:35: error: ‘FRR_PTM_NAME’ undeclared (first use in this function)
  119 |  snprintf(buf, sizeof(buf), "%s", FRR_PTM_NAME);
      |                                   ^~~~~~~~~~~~
zebra/zebra_ptm.c:119:35: note: each undeclared identifier is reported only once for each function it appears in
make[1]: *** [Makefile:10520: zebra/zebra_ptm.o] Error 1
```

The reason is that `FRR_PTM_NAME` is defined in `version.h` which is not
imported.

This commit adds the missing import.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>

0 files changed, 0 insertions, 0 deletions