tools/edbg: Update to latest version.

The lastest version of edbg solves a double-reset issue that was
hindering testing (see #11125 and ataradov/edbg#77)

It also adds support for SAMR34 and SAMR35, needed by @dylad for MCU
port.

dist/tools/edbg/Makefile

@@ -1,6 +1,6 @@
 PKG_NAME=edbg
 PKG_URL=https://github.com/ataradov/edbg
-PKG_VERSION=807d948cc8a664ade3e9446b4937aa54268afcb2
+PKG_VERSION=4f5d490bfffc7fd10855e513e6e88be5a9a3f789
 PKG_LICENSE=BSD-3-Clause
 PKG_BUILDDIR=$(CURDIR)/bin