Make library/header paths visible to cmd/go script tests, which is necessary for
cgo/gccgo tests to work correctly

diff --git a/src/cmd/go/script_test.go b/src/cmd/go/script_test.go
index dfaa40548e..9d0f0e9bcd 100644
--- a/src/cmd/go/script_test.go
+++ b/src/cmd/go/script_test.go
@@ -100,6 +100,10 @@ const (
 var extraEnvKeys = []string{
 	"SYSTEMROOT",         // must be preserved on Windows to find DLLs; golang.org/issue/25210
 	"WINDIR",             // must be preserved on Windows to be able to run PowerShell command; golang.org/issue/30711
+	"CPATH",
+	"C_INCLUDE_PATH",
+	"CPLUS_INCLUDE_PATH",
+	"LIBRARY_PATH",
 	"LD_LIBRARY_PATH",    // must be preserved on Unix systems to find shared libraries
 	"CC",                 // don't lose user settings when invoking cgo
 	"GO_TESTING_GOTOOLS", // for gccgo testing
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<tr><td><span title='2020-07-27 12:06:36 +0200'>2020-07-27</span></td><td><a href='/guix/commit/gnu/services/auditd.scm?id=73cb3e103f35356b83cb091f15c536c21bf53981'>services: auditd: Provide default configuration directory.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/auditd.scm (auditd.conf)
(%default-auditd-configuration-directory): New variables.
(&lt;auditd-configuration&gt;): Switch to 'define-record-type*'.
[configuration-directory]: New field.
(auditd-shepherd-service): Honor 'configuration-directory'.  Pass #:pid-file.
(auditd-service-type)[description]: Tweak.
[default-value]: Provide 'configuration-directory'.
* doc/guix.texi (Miscellaneous Services): Update docs to reflect
changes.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Robin Green</td></tr>