WITHOUT_TOOLCHAIN: Fix build of rtld.

MK_TOOLCHAIN==no disables building and installing of pic archives.
c_pic.a is still needed for rtld though so force it to build in lib/libc
and link directly to the objdir version of it for rtld.

Somehow this has been broken since r148725.

Sponsored by:	EMC / Isilon Storage Division

lib/libc/Makefile

@@ -5,6 +5,9 @@ SHLIBDIR?= /lib
 
 .include <src.opts.mk>
 
+# Force building of libc_pic.a
+MK_TOOLCHAIN=	yes
+
 LIBC_SRCTOP?= ${.CURDIR}
 
 # Pick the current architecture directory for libc. In general, this is

libexec/rtld-elf/Makefile

@@ -45,6 +45,9 @@ CFLAGS+=	-fvisibility=hidden
 .endif
 LDFLAGS+=	-shared -Wl,-Bsymbolic
 LIBADD=		c_pic
+.if ${MK_TOOLCHAIN} == "no"
+LDFLAGS+=	-L${LIBCDIR}
+.endif
 
 .if ${MACHINE_CPUARCH} == "arm"
 # Some of the required math functions (div & mod) are implemented in