[fuchsia] Use Scrt1.o to build instead of crt1.o

Fuchsia only supports loading PIE executables. This is the last place
that referenced crt1.o in Fuchsia.

Change-Id: Ie6f4305540d63207485671693e846da25b5945f2
diff --git a/misc/fuchsia/gccwrap.sh b/misc/fuchsia/gccwrap.sh
index af77df6..2e3e52c 100755
--- a/misc/fuchsia/gccwrap.sh
+++ b/misc/fuchsia/gccwrap.sh
@@ -28,7 +28,7 @@
 done
 
 if ! $compiler; then
-	extra_args="-lc $zirconbuild/system/ulib/crt1.o $zirconbuild/system/ulib/zircon/libzircon.so.abi"
+	extra_args="-lc $zirconbuild/sysroot/lib/Scrt1.o $zirconbuild/system/ulib/zircon/libzircon.so.abi"
 fi
 
 exec $gccbin \
@@ -50,4 +50,3 @@
 	-Wl,-dynamic-linker=ld.so.1 \
 	$extra_args \
 	"$@"
-