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='2023-02-09 21:58:18 +0200'>2023-02-09</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=66a6c516e2b774805c2c583766d8231f6b58e028'>gnu: ncdu: Update to 2.2.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu): Update to 2.2.2.
[native-inputs]: Switch from zig-0.9 to zig-0.10.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-02-09 21:58:17 +0200'>2023-02-09</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=85b065c6fce7c1e9a6c2cd24392b8113a4a66903'>gnu: zig: Update to 0.10.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/zig.scm (zig-0.10): New variable.
(zig-0.9): Rename from zig. Inherit from zig-0.10.
(zig): Define as zig-0.10.
* gnu/packages/ncdu.scm (ncdu)[native-inputs]: Use zig-0.9.
* gnu/packages/zig-xyz.scm (zig-zls)[inputs]: Use zig-0.9.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-12-11 01:00:05 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=d0d06d81682ed88e4ba59b02cedbf52f58af8155'>gnu: ncdu: Use upstream name.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-1): New variable, renamed from…
(ncdu): …this one, itself renamed from the old ncdu-2.  Simple!
[name]: Drop suffix.
[properties]: Remove obsolete 'upstream-name.
(ncdu-2): Redefine as a DEPRECATED-PACKAGE alias of ncdu.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-11 01:00:04 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=7951892d39211aaeccefeab9a5971ec08572cce8'>gnu: ncdu2: Delete pregenerated man page from source.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu2)[source]: Add a snippet.
[arguments]: Adjust 'build-manpage phase accordingly.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-11 01:00:04 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=a4e98faa1e852c0e25bddd915a7dd8c8bed26a04'>gnu: ncdu2: Do not use the illegal instructions.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2)[arguments]: Compile for a baseline CPU.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-15 17:11:35 +0200'>2022-12-15</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=b19f5bbac79522438bb9deca8bbb28fc0f751903'>gnu: ncdu: Update to 1.18.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu): Update to 1.18.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-11-01 19:03:31 +0200'>2022-11-01</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=088962f3c29d958809f47fec81bb01aaf4592b8c'>gnu: ncdu-2: Update to 2.2.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2): Update to 2.2.1.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-10-18 09:22:39 +0300'>2022-10-18</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=054ddcbbc6a5465a56c84414ef49389487f7ef6d'>gnu: ncdu-2: Update to 2.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2): Update to 2.2.
</span></span></td><td>Efraim Flashner</td></tr>