build: Move patches to <patch-repos> dir

Decouple main Makefile and repository patches by moving all Fuel
component patches to a subdir, <patch-repo>.

Proposed structure of <patch-repos> dir:
- patch-repos/*.patch are intended for <fuel-main> git repo;
- patch-repos/build/repo/<fuel-module>/*.patch are intended for
  <fuel-module>, e.g. "fuel-nailgun";

Full list of Fuel submodules supported by this mechanism at [1].

While at it, replace all occurences of </tmp/fuel-main> with
<FUEL_MAIN_DIR> in main Makefile and rewrite a few git/make calls
to use the "-C" arg.

NOTE: `git -C` is available starting with git 1.8.5.

[1] https://github.com/openstack/fuel-main/blob/stable/mitaka/repos.mk
    #L32-L44

Change-Id: I5e4adc7285054777c3898592ed48482ccd2b706f
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/build/patch-repos/0030-repo-multi-arch-local-mirrors.patch b/build/patch-repos/0030-repo-multi-arch-local-mirrors.patch
new file mode 100644
index 000000000..d40428743
--- /dev/null
+++ b/build/patch-repos/0030-repo-multi-arch-local-mirrors.patch
@@ -0,0 +1,59 @@
+From: Stanislaw Kardach <stanislaw.kardach@cavium.com>
+Date: Thu, 25 Feb 2016 13:31:19 +0100
+Subject: repo mirror: Allow multi-arch local mirrors
+
+This patch allows specifying multiple architectures via UBUNTU_ARCH in
+form of a list of space separated architectures. The first architecture
+in the list is considered primary and will be used for building all the
+deb packages by fuel-main. Additional architectures are added to allow
+targets of other architectures to use the mirror.
+NOTE: this imposes a requirement that all packages built are arch
+independent (which is true so far).
+
+Signed-off-by: Stanislaw Kardach <stanislaw.kardach@cavium.com>
+Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+---
+ mirror/ubuntu/module.mk | 2 +-
+ sandbox.mk              | 2 +-
+ config.mk               | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/mirror/ubuntu/module.mk b/mirror/ubuntu/module.mk
+index 7a9466e..fe1ada2 100644
+--- a/mirror/ubuntu/module.mk
++++ b/mirror/ubuntu/module.mk
+@@ -81,7 +81,7 @@ $(BUILD_DIR)/mirror/ubuntu/mirror.done:
+ 	--root=$(MIRROR_MOS_UBUNTU_ROOT) \
+ 	--dist=$(MIRROR_MOS_UBUNTU_SUITE) \
+ 	--section=$(subst $(space),$(comma),$(MIRROR_MOS_UBUNTU_SECTION)) \
+-	--arch=$(UBUNTU_ARCH) \
++	--arch=$(shell echo $(UBUNTU_ARCH) | tr ' ' ',') \
+ 	$(LOCAL_MIRROR_UBUNTU)/
+ 	rm -rf $(LOCAL_MIRROR_UBUNTU)/.temp $(LOCAL_MIRROR_UBUNTU)/project
+ 	$(ACTION.TOUCH)
+diff --git a/sandbox.mk b/sandbox.mk
+index 4bc3962..5ffddbd 100644
+--- a/sandbox.mk
++++ b/sandbox.mk
+@@ -188,7 +188,7 @@ touch $(SANDBOX_UBUNTU)/etc/init.d/.legacy-bootordering
+ mkdir -p $(SANDBOX_UBUNTU)/usr/sbin
+ cp -a $(BUILD_DIR)/policy-rc.d $(SANDBOX_UBUNTU)/usr/sbin
+ echo "Running debootstrap"
+-sudo debootstrap --no-check-gpg --include=ca-certificates --arch=$(UBUNTU_ARCH) $(MIRROR_UBUNTU_SUITE) $(SANDBOX_UBUNTU) $(MIRROR_UBUNTU_METHOD)://$(MIRROR_UBUNTU)$(MIRROR_UBUNTU_ROOT)
++sudo debootstrap --no-check-gpg --include=ca-certificates --arch=$(word 1,$(UBUNTU_ARCH)) $(MIRROR_UBUNTU_SUITE) $(SANDBOX_UBUNTU) $(MIRROR_UBUNTU_METHOD)://$(MIRROR_UBUNTU)$(MIRROR_UBUNTU_ROOT)
+ if [ -e $(SANDBOX_UBUNTU)/etc/resolv.conf ]; then sudo cp -a $(SANDBOX_UBUNTU)/etc/resolv.conf $(SANDBOX_UBUNTU)/etc/resolv.conf.orig; fi
+ sudo cp /etc/resolv.conf $(SANDBOX_UBUNTU)/etc/resolv.conf
+ if [ -e $(SANDBOX_UBUNTU)/etc/hosts ]; then sudo cp -a $(SANDBOX_UBUNTU)/etc/hosts $(SANDBOX_UBUNTU)/etc/hosts.orig; fi
+diff --git a/config.mk b/config.mk
+index 74ee039..45a3b30 100644
+--- a/config.mk
++++ b/config.mk
+@@ -49,7 +49,7 @@ UBUNTU_MINOR:=04
+ UBUNTU_RELEASE_NUMBER:=$(UBUNTU_MAJOR).$(UBUNTU_MINOR)
+ UBUNTU_KERNEL_FLAVOR?=lts-trusty
+ UBUNTU_NETBOOT_FLAVOR?=netboot
+-UBUNTU_ARCH:=amd64
++UBUNTU_ARCH?=amd64
+ UBUNTU_IMAGE_RELEASE:=$(UBUNTU_MAJOR)$(UBUNTU_MINOR)
+ SEPARATE_IMAGES?=/boot,ext2 /,ext4
+