UPSTREAM: Use more secure HTTPS URLs for coreboot sites

The coreboot sites support HTTPS, and requests over HTTP with SSL are
also redirected. So use the more secure URLs, which also saves a
request most of the times, as nothing needs to be redirected.

Run the command below to replace all occurences.

```
$ git grep -l -E 'http://(www.|review.|)coreboot.org'
| xargs sed -i 's,http://\(.*\)coreboot.org,https://\1coreboot.org,g'
```

BUG=none
BRANCH=none
TEST=none

Change-Id: I881e55138a6114c67585ce37d4d719fe2626b83a
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: a8843dee58
Original-Change-Id: If53f8b66f1ac72fb1a38fa392b26eade9963c369
Original-Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Original-Reviewed-on: https://review.coreboot.org/20034
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://chromium-review.googlesource.com/528256
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>

payloads/external/FILO/Kconfig.name

@@ -5,4 +5,4 @@ config PAYLOAD_FILO
 	  with a FILO payload. If you don't know what this is
 	  about, just leave it enabled.
 
-	  See http://coreboot.org/Payloads for more information.
+	  See https://coreboot.org/Payloads for more information.

payloads/external/GRUB2/Kconfig.name

@@ -5,4 +5,4 @@ config PAYLOAD_GRUB2
 	  with a GRUB2 payload. If you don't know what this is
 	  about, just leave it enabled.
 
-	  See http://coreboot.org/Payloads for more information.
+	  See https://coreboot.org/Payloads for more information.

payloads/external/SeaBIOS/Kconfig.name

@@ -6,4 +6,4 @@ config PAYLOAD_SEABIOS
 	  with a SeaBIOS payload. If you don't know what this is
 	  about, just leave it enabled.
 
-	  See http://coreboot.org/Payloads for more information.
+	  See https://coreboot.org/Payloads for more information.

payloads/external/U-Boot/Kconfig.name

@@ -5,6 +5,6 @@ config PAYLOAD_UBOOT
 	  Select this option if you want to build a coreboot image
 	  with a U-Boot payload.
 
-	  See http://coreboot.org/Payloads and U-Boot's documentation
+	  See https://coreboot.org/Payloads and U-Boot's documentation
 	  at http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.x86
 	  for more information.

payloads/external/depthcharge/Kconfig.name

@@ -5,4 +5,4 @@ config PAYLOAD_DEPTHCHARGE
 	  Select this option if you want to build a coreboot image
 	  with a depthcharge payload.
 
-	  See http://coreboot.org/Payloads for more information.
+	  See https://coreboot.org/Payloads for more information.

payloads/external/tianocore/Kconfig.name

@@ -5,4 +5,4 @@ config PAYLOAD_TIANOCORE
 	  with a Tiano Core payload. If you don't know what this is
 	  about, just leave it enabled.
 
-	  See http://coreboot.org/Payloads for more information.
+	  See https://coreboot.org/Payloads for more information.