package/git: fix wchar-less uclibc build
The package fails to build on wchar-less uClibc-ng configuration
(i.e. without BR2_TOOLCHAIN_BUILDROOT_WCHAR selected):
```
CC t/unit-tests/unit-test.o
t/unit-tests/clar/clar.c: In function 'clar__assert_equal':
t/unit-tests/clar/clar.c:767:23: error: unknown type name 'wchar_t'
767 | const wchar_t *wcs1 = va_arg(args, const wchar_t *);
| ^~~~~~~
In file included from t/unit-tests/clar/clar.c:13:
t/unit-tests/clar/clar.c:767:58: error: unknown type name 'wchar_t'
767 | const wchar_t *wcs1 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:768:23: error: unknown type name 'wchar_t'
768 | const wchar_t *wcs2 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:768:58: error: unknown type name 'wchar_t'
768 | const wchar_t *wcs2 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:769:65: warning: implicit declaration of function 'wcscmp' [-Wimplicit-function-declaration]
769 | is_equal = (!wcs1 || !wcs2) ? (wcs1 == wcs2) : !wcscmp(wcs1, wcs2);
| ^~~~~~
t/unit-tests/clar/clar.c:784:23: error: unknown type name 'wchar_t'
784 | const wchar_t *wcs1 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:784:58: error: unknown type name 'wchar_t'
784 | const wchar_t *wcs1 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:785:23: error: unknown type name 'wchar_t'
785 | const wchar_t *wcs2 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:785:58: error: unknown type name 'wchar_t'
785 | const wchar_t *wcs2 = va_arg(args, const wchar_t *);
| ^~~~~~~
t/unit-tests/clar/clar.c:787:65: warning: implicit declaration of function 'wcsncmp' [-Wimplicit-function-declaration]
787 | is_equal = (!wcs1 || !wcs2) ? (wcs1 == wcs2) : !wcsncmp(wcs1, wcs2, len);
| ^~~~~~~
make[1]: *** [Makefile:2795: t/unit-tests/clar/clar.o] Error 1
```
This is because since version 2.47.0, Git imports clar unit testing
framework, which uses wchar_t. On wchar-less uClibc-ng configuration,
however, the installed <wchar.h> header is a stub (that is, wchar_t
is undefined).
Apply upstream patchset from Patrick Steinhardt [1], which includes
upstreamed clar build fix.
Fixes: https://autobuild.buildroot.org/results/85dbf87451156fce7c2a12d8882622ea75e0d0db
Link: https://lore.kernel.org/git/cover.1729506329.git.ps@pks.im/ [1]
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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