tests: vm: Honor EPATH in uevent.sh

This is useful for testing CRDA since it means you can use EPATH to
redirect the test scripts to a different crda binary.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

tests/hwsim/vm/uevent.sh

@@ -1,5 +1,8 @@
 #!/bin/sh
 
+EPATH=$(sed 's/.*EPATH=\([^ ]*\) .*/\1/' /proc/cmdline)
+PATH=/tmp/bin:$EPATH:$PATH
+
 # assume this was a call for CRDA,
 # if not then it won't find a COUNTRY
 # environment variable and exit