cmd/go: update gcc version check for asan support on ppc64le
Update the minimum version required for asan to be gcc9.
This will ensure that go build -asan is supported only on
systems with the required version of gcc. Update the asan
error message to include the name of the compiler (the
error message is updated to include the name of the compiler
instead of C compiler for other platforms as well).
Related to CL 425355
Change-Id: Ib864d43b2b3028f39ffcf792890a678361f507f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/436740
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Archana Ravindar <aravind5@in.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>