HACK: pbl: hackily disable own string op definitions

When building with libfuzzer, these are provided by the compiler.

Signed-off-by: Ahmad Fatoum <[email protected]>

pbl/Makefile

@@ -4,7 +4,7 @@
 # only unsed by the pbl
 #
 pbl-y += misc.o
-pbl-y += string.o
+#pbl-y += string.o
 pbl-$(CONFIG_HAVE_IMAGE_COMPRESSION) += decomp.o
 pbl-$(CONFIG_LIBFDT) += fdt.o
 pbl-$(CONFIG_PBL_CONSOLE) += console.o