polkit: backport a fix for musl compilation

Backport upstream fix. Without it it fails a build with musl
with a message like:

| ../../../polkit-0.119/src/polkitbackend/polkitbackendduktapeauthority.c: In function 'js_polkit_user_is_in_netgroup':
| ../../../polkit-0.119/src/polkitbackend/polkitbackendduktapeauthority.c:1039:7: warning: implicit declaration of function 'innetgr' [-Wimplicit-function-declaration]
|  1039 |   if (innetgr (netgroup,
|       |       ^~~~~~~
...
| /tmp/workspace.s8oaEh28da/build/tmp/work/corei7-64-oniro-linux-musl/polkit/0.119-r0/recipe-sysroot-native/usr/bin/x86_64-oniro-linux-musl/../../libexec/x86_64-oniro-linux-musl/gcc/x86_64-oniro-linux-musl/11.3.0/ld: ./.libs/libpolkit-backend-1.a(libpolkit_backend_1_la-polkitbackendduktapeauthority.o): in function `js_polkit_user_is_in_netgroup':
| /usr/src/debug/polkit/0.119-r0/build/src/polkitbackend/../../../polkit-0.119/src/polkitbackend/polkitbackendduktapeauthority.c:1039: undefined reference to `innetgr'
| collect2: error: ld returned 1 exit status

Update 0003-Added-support-for-duktape-as-JS-engine.patch accordingly
(configure.ac required changes).

Upstream-Status: Pending

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>