security/zeek: Update PATH the crash-diag so it can locate gdb

Previously the script was not finding gdb.

security/zeek/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	zeek
 DISTVERSION=	8.0.4
+PORTREVISION=	1
 CATEGORIES=	security
 MASTER_SITES=	https://download.zeek.org/
 
@@ -160,6 +161,11 @@ STRIP=
 USE_RC_SUBR=	zeek
 .endif
 
+# Let crash-diag find gdb (when installed)
+post-patch:
+	${REINPLACE_CMD} -e "2s,^\#,export PATH=${LOCALBASE}/bin"':$${PATH}', \
+	    ${WRKSRC}/auxil/zeekctl/bin/crash-diag
+
 post-install:
 	${MV} ${STAGEDIR}${DATADIR}/site/local.zeek \
 	    ${STAGEDIR}${DATADIR}/site/local.zeek.sample