fbv: fix build_style

- Switch to configure
- Respect configure_args
- Remove redundant --prefix=/usr
- Remove wrong --bindir=/usr/sbin

srcpkgs/fbv/template

@@ -2,7 +2,7 @@
 pkgname=fbv
 version=1.0b
 revision=1
-build_style=gnu-configure
+build_style=configure
 makedepends="libpng-devel libjpeg-turbo-devel giflib-devel"
 short_desc="Framebuffer image viewer"
 maintainer="Duncaen <duncaen@voidlinux.eu>"
@@ -17,7 +17,7 @@ do_configure() {
 		sed -i "s/^CC.*/CC=${XBPS_CROSS_TRIPLET}-gcc/" Makefile
 		sed -i "s/^cc/${XBPS_CROSS_TRIPLET}-gcc/" configure
 	fi
-	./configure --prefix=/usr --bindir=/usr/sbin --libs="-lgif"
+	./configure ${configure_args} --libs="-lgif"
 }
 
 do_install() {