config: cleanup buildsystem

Signed-off-by: Stephan Raue <stephan@openelec.tv>
gcc: clean up unused depends
darwin-cross: cosmetics
buildsystem: clean up and cosmetics
scripts/build: remove 'hosttools', not used (anymore) target

Signed-off-by: Stephan Raue <stephan@openelec.tv>
eglibc: fix $PKG_CONFIGURE_OPTS_TARGET

Signed-off-by: Stephan Raue <stephan@openelec.tv>
lzo:host: dont depend on toolchain

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libtool: fix dependencies

Signed-off-by: Stephan Raue <stephan@openelec.tv>
kmod:host: dont depend on toolchain

Signed-off-by: Stephan Raue <stephan@openelec.tv>
squashfs: fix dependencies

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'x11' (virtual), add variable $LIBVA to config/graphic

Signed-off-by: Stephan Raue <stephan@openelec.tv>
vdpauinfo: move to package 'debug'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'libc' (virtual), rework dependencies in scripts/image

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libfontenc: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libICE: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libpciaccess: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libSM: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libX11: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libXau: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libxcb: rework PKG_DEPENDS, replace and merge PKG_BUILD_DEPENDS_* with PKG_DEPENDS_*

Signed-off-by: Stephan Raue <stephan@openelec.tv>