GENERIC: enable extended error strings on all archs

This follows commit 3296fda0c3.

PR:		289236
Reviewed by:	kib
MFC after:	3 days

sys/amd64/conf/GENERIC

@@ -27,7 +27,7 @@ options 	SCHED_ULE		# ULE scheduler
 options 	SCHED_4BSD		# Original 4.xBSD scheduler
 options 	NUMA			# Non-Uniform Memory Architecture support
 options 	PREEMPTION		# Enable kernel thread preemption
-options 	EXTERR_STRINGS
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols

sys/arm/conf/std.armv7

@@ -3,6 +3,7 @@
 
 options 	HZ=1000
 options 	PREEMPTION		# Enable kernel thread preemption
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols

sys/arm64/conf/std.arm64

@@ -7,7 +7,7 @@ makeoptions	WITH_CTF=1		# Run ctfconvert(1) for DTrace support
 options 	SCHED_ULE		# ULE scheduler
 options 	NUMA			# Non-Uniform Memory Architecture support
 options 	PREEMPTION		# Enable kernel thread preemption
-options 	EXTERR_STRINGS
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols

sys/i386/conf/GENERIC

@@ -29,6 +29,7 @@ makeoptions	WITH_CTF=1		# Run ctfconvert(1) for DTrace support
 
 options 	SCHED_ULE		# ULE scheduler
 options 	PREEMPTION		# Enable kernel thread preemption
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols

sys/powerpc/conf/GENERIC

@@ -34,6 +34,7 @@ options 	PSERIES			# PAPR-compliant systems
 options 	FDT
 options 	SCHED_ULE		# ULE scheduler
 options 	PREEMPTION		# Enable kernel thread preemption
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols

sys/riscv/conf/GENERIC

@@ -25,6 +25,7 @@ makeoptions	WITH_CTF=1		# Run ctfconvert(1) for DTrace support
 
 options 	SCHED_ULE		# ULE scheduler
 options 	PREEMPTION		# Enable kernel thread preemption
+options 	EXTERR_STRINGS		# Retain exterror(9) strings in the kernel
 options 	VIMAGE			# Subsystem virtualization, e.g. VNET
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols