Fixed the hack for using "../libgcc/Makefile" in libgcc_r/Makefile.

${LIB} was wrong at dependency-parsing time, so dependencies for
libgcc_r*.a were wrong.  This somehow worked right, except libgcc_r*.a
were always out of date.

gnu/lib/libgcc/Makefile

@@ -4,7 +4,9 @@ GCCDIR=	${.CURDIR}/../../../contrib/egcs/gcc
 
 .PATH: ${GCCDIR}/cp ${GCCDIR}
 
+.if !defined(LIB) || ${LIB} != "gcc_r"
 LIB=	gcc
+.endif
 
 # Install libgcc_pic.a, since ld.so uses it.
 INSTALL_PIC_ARCHIVE=  yes

gnu/lib/libgcc_r/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.include "../libgcc/Makefile"
-
 LIB=	gcc_r
 CFLAGS+=-D_PTHREADS
+
+.include "../libgcc/Makefile"