Remove debug symbol from installed library, one can always

use compiled version in libthr directory.

lib/libthr/Makefile

@@ -9,7 +9,6 @@
 # system call stubs.
 LIB=thr
 SHLIB_MAJOR= 1
-DEBUG_FLAGS=-g
 CFLAGS+=-DPTHREAD_KERNEL
 CFLAGS+=-I${.CURDIR}/../libc/include -I${.CURDIR}/thread \
 	-I${.CURDIR}/../../include
@@ -25,6 +24,7 @@ LDFLAGS= -Wl,--version-script=${.CURDIR}/pthread.map
 
 # enable extra internal consistancy checks
 CFLAGS+=-D_PTHREADS_INVARIANTS -Wall
+CFLAGS+=-g
 
 PRECIOUSLIB=