Remove PIE flags from the build

Generating a statically linked binary built with PIE requires the
Scrt1.o file, which isn't part of Buildroot uClibc toolchains. To
solve this, we simply disable the PIE flags.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/Makedefs.in
===================================================================
--- a/Makedefs.in
+++ b/Makedefs.in
@@ -142,7 +142,7 @@
 IPPFIND_MAN	=	@IPPFIND_MAN@
 LDFLAGS		=	-L../cgi-bin -L../cups -L../filter -L../ppdc \
 			-L../scheduler @LDARCHFLAGS@ \
-			@LDFLAGS@ @RELROFLAGS@ @PIEFLAGS@ $(OPTIM)
+			@LDFLAGS@ @RELROFLAGS@ $(OPTIM)
 LINKCUPS	=	@LINKCUPS@ $(LIBGSSAPI) $(DNSSDLIBS) $(LIBZ)
 LINKCUPSIMAGE	=	@LINKCUPSIMAGE@
 LIBS		=	$(LINKCUPS) $(COMMONLIBS)