K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2013-02-02T11:58:35.494268Z
K 7
svn:log
V 282
print compiler version in the kernel banner

And provide kernel compiler version as a sysctl as well.
This is useful while we have gcc and clang cohabitation.
This could be even more useful when we have support
for external toolchains.

In cooperation with:	mjg
MFC after:		13 days

END