package/gdb: add patch fixing gnulib related issue with musl toolchains

package/gdb: add patch fixing gnulib related issue with musl toolchains

Backport the upstream patch fixing the gdb build with musl toolchains.

Only gdb 8.1.1 [1] and 8.2 [2] release are affected.

Fixes:
https://gitlab.com/free-electrons/toolchains-builder/-/jobs/95552308

[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=2441702a72f324e41a1624dc042b334f375e2d81
[2] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=25e3c82c0e927398e759e2d5e35623012b8683f7

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>