meta-skeleton: Add name attribute to SRC_URI

The SRCREV_machine line does not work without having name=machine
attribute in SRC_URI.

This error is seen if the custom kernel recipe is used without
the name attribute:

NOTE: Error during finalise of .../linux-yocto-custom.bb
ERROR: ExpansionError during parsing .../linux-yocto-custom.bb: Failure expanding variable do_patch: ExpansionError: Failure expanding variable SRCPV, expression was ${@bb.fetch2.get_srcrev(d)} which triggered exception FetchError: Fetcher failure for URL: 'git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git;protocol=git;nocheckout=1'. Please set a valid SRCREV for url ['SRCREV_default_pn-linux-yocto-custom', 'SRCREV_default', 'SRCREV_pn-linux-yocto-custom', 'SRCREV'] (possible key names are git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git;protocol=git;nocheckout=1, or use a ;rev=X URL parameter)

(From OE-Core rev: 760ae021fe1714d04c34bc00d472e2d756b3823a)

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-skeleton/recipes-kernel/linux/linux-yocto-custom.bb

@@ -46,7 +46,7 @@ require recipes-kernel/linux/linux-yocto.inc
 
 # Override SRC_URI in a bbappend file to point at a different source
 # tree if you do not want to build from Linus' tree.
-SRC_URI = "git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git;protocol=git;nocheckout=1"
+SRC_URI = "git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git;protocol=git;nocheckout=1;name=machine"
 
 LINUX_VERSION ?= "3.4"
 LINUX_VERSION_EXTENSION ?= "-custom"