package/bdwgc: bump version to 7.6.2

Removed patches applied upstream:

0002-Fix-uClibc-build.patch
https://github.com/ivmai/bdwgc/commit/047230b71d421407ad2c8641ee4a87a1bd89145b

0003-configure-match-uclinux-pattern.patch
https://github.com/ivmai/bdwgc/commit/a628c90bdbf397465ac2ab2b11f14eb2e853651c



Renumbered remaining patches, added license hash.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>