Crank all library major numbers. Needed due to the fact that we

now build libraries with propolice enabled.  Without this, existing
binaries (such as ports/packages) that link with any system library
other than libc will fail with an undefined symbol of "___guard"
(__guard on ELF).
Pointed out by markus@ and discussed with deraadt@

src/lib/libutil/shlib_version

@@ -1,2 +1,2 @@
-major=7
-minor=1
+major=8
+minor=0