package/openpgm: fix link for 32-bit x86

package/openpgm: fix link for 32-bit x86

Add upstream patch fixing link with libpgm on build for x86 32-bit.

Fixes:
http://autobuild.buildroot.net/results/80254e61dc55bc07b16b3b66710946c71b9d53bb/
http://autobuild.buildroot.net/results/7bce71db86df8ba204153e0ab5022fb5ace9a6e5/
http://autobuild.buildroot.net/results/24a0aaff8f46953d015218a60da2c9856152eea3/

Cc: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Cc: Alexander Lukichev <alexander.lukichev@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>