runtime: adjust GOARM floating point compatibility error message

As pointed out by Josh Bleecher Snyder in CL 99780.

The check is for GOARM > 6, so suggest to recompile with either GOARM=5
or GOARM=6.

Change-Id: I6a97e87bdc17aa3932f5c8cb598bba85c3cf4be9
Reviewed-on: https://go-review.googlesource.com/101936
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

src/runtime/os_freebsd_arm.go

@@ -21,7 +21,7 @@ func checkgoarm() {
 	}
 	if goarm > 6 && hwcap&_HWCAP_VFPv3 == 0 {
 		print("runtime: this CPU has no VFPv3 floating point hardware, so it cannot run\n")
-		print("this GOARM=", goarm, " binary. Recompile using GOARM=5.\n")
+		print("this GOARM=", goarm, " binary. Recompile using GOARM=5 or GOARM=6.\n")
 		exit(1)
 	}
 

src/runtime/os_linux_arm.go

@@ -33,7 +33,7 @@ func checkgoarm() {
 	}
 	if goarm > 6 && hwcap&_HWCAP_VFPv3 == 0 {
 		print("runtime: this CPU has no VFPv3 floating point hardware, so it cannot run\n")
-		print("this GOARM=", goarm, " binary. Recompile using GOARM=5.\n")
+		print("this GOARM=", goarm, " binary. Recompile using GOARM=5 or GOARM=6.\n")
 		exit(1)
 	}
 }