neotest: Recent coreutils are needed to run

For example we need realpath and if base os provides only older coreutils there
is no such utility and neotest fails:

/srv/slapgrid/slappart8/srv/testnode/bct/soft/55158b6a5b027aa40954c3f974d5b3e9/go.work/src/lab.nexedi.com/kirr/neo/go/neo/t/neotest: line 589: realpath: command not found

Fix it by building & hooking into $PATH coreutils by ourselves.

software/neotest/neotest-env.sh.in

@@ -2,6 +2,7 @@
 
 . ${gowork:env.sh}
 
+PATH="${coreutils:location}/bin:$PATH"
 PATH="${ethtool:location}/sbin:$PATH"
 PATH="${ioping:location}/bin:$PATH"
 PATH="${lmbench:location}/bin:$PATH"

software/neotest/software.cfg

@@ -12,6 +12,7 @@ extends =
     ../../component/ethtool/buildout.cfg
     ../../component/ioping/buildout.cfg
     ../../component/lmbench/buildout.cfg
+    ../../component/coreutils/buildout.cfg
 
 parts =
     gowork
@@ -19,6 +20,9 @@ parts =
     ioping
     ethtool
 
+#   neotest uses realpath & friends
+    coreutils
+
     neoppod-develop
     neoppod
     wendelin.core-dev
@@ -54,7 +58,7 @@ output  = ${buildout:directory}/${:_buildout_section_name_}
 
 [neotest-env.sh]
 <= buildout-template
-md5sum  = 6e2203c7a86e8a3e8e56b8086115f5d4
+md5sum  = 8078e2871d30ea3badf29d1d60762b66
 
 [neotest]
 <= buildout-template