build: Update gradlew to 4.6
build: Update gradlew to 4.6

Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

seanbright/bndtools,grfield/bndtools,psoreide/bnd,psoreide/bnd,bndtools/bndtools,timothyjward/bndtools,seanbright/bndtools,bndtools/bndtools,timothyjward/bndtools,grfield/bndtools,bndtools/bndtools,seanbright/bndtools,grfield/bndtools,timothyjward/bndtools,bndtools/bndtools,timothyjward/bndtools,bndtools/bndtools,grfield/bndtools,seanbright/bndtools,psoreide/bnd,timothyjward/bndtools,seanbright/bndtools,grfield/bndtools