buildroot: workaround broken syntax highlighting

GNU Make's subst is always breaking syntax highlighting with at least
vim add the right comments to workaround it.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37046 3c298f89-4303-0410-b956-a3cf2f4a3e73
buildroot: build a second pass kernel if initramfs is enabled

If initramfs is enabled, build a second pass kernel containing the CPIO
rootfs, preliminary work to get non exclusive enabling of initramfs.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37047 3c298f89-4303-0410-b956-a3cf2f4a3e73
buildroot: copy KENRNELNAME files to $(KDIR)

In order to support building both normal and initramfs kernel, we will
rebuild the wrappers around the vmlinux ELF binary, copy these with an
appropriate extension when they exist.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37048 3c298f89-4303-0410-b956-a3cf2f4a3e73
targets: prepare for supporting normal and initramfs images

In order to support both normal images and initramfs, ensure that each
target sets KERNELNAME properly so that the generic kernel building code
can copy the corresponding files over $(KDIR) with the appropriate
extension. Update the various paths to the kernel and wrapper images
from $(LINUX_DIR)/arch/$(ARCH)/boot/$(foo) to $(KDIR)/$(foo).

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37049 3c298f89-4303-0410-b956-a3cf2f4a3e73
include/image.mk: do not make initramfs build exclusive

Allow building initramfs along with other types of filesystems.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37050 3c298f89-4303-0410-b956-a3cf2f4a3e73