icecc.bbclass: prevent nativesdk builds depending on target specific KERNEL_CC
* without this we cause nativesdk-linux-libc-headers to depend
on target specific KERNEL_CC (through icecc_get_tool ->
icecc_is_kernel -> KERNEL_CC -> HOST_CC_KERNEL_ARCH ->
TARGET_CC_KERNEL_ARCH -> TUNE_FEATURES(thumb) as shown by
bitbake-diffsigs:
OE qemux86@ ~/build/oe-core $ ls /OE/build/oe-core/tmp-glibc/sstate-diff/
1499859497/qemu*/*sdk*/*/*do_configure.sigdata*
/OE/build/oe-core/tmp-glibc/sstate-diff/
1499859497/qemuarm/x86_64-nativesdk-oesdk-linux/nativesdk-linux-libc-headers/4.10-r0.do_configure.sigdata.
3a9a423878d56524e0ee8e42eba1804f
/OE/build/oe-core/tmp-glibc/sstate-diff/
1499859497/qemux86/x86_64-nativesdk-oesdk-linux/nativesdk-linux-libc-headers/4.10-r0.do_configure.sigdata.
401071dbaa88903ece37d35a47965ff2
OE qemux86@ ~/build/oe-core $ bitbake-diffsigs /OE/build/oe-core/tmp-glibc/sstate-diff/
1499859497/qemu*/*sdk*/*/*do_configure.sigdata*
basehash changed from
39774238b66763c598153132e87a2c1a to
aa2d66e770bf533e312536eb0a401c4c
Variable TARGET_CC_KERNEL_ARCH value changed from '${@bb.utils.contains('TUNE_FEATURES', 'thumb', '-mno-thumb-interwork-marm', '', d)} TUNE_FEATURES{thumb} = Set' to ''
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
